[[caption-width-right:330:The ultimate OhCrap moment.]]

->'''Alison:''' ''I'm pregnant.''
->'''Ben:''' ''Pregnant... with emotion?''
->'''Alison:''' ''Pregnant with a baby.''

''Knocked Up'' is a 2007 romantic comedy directed by Creator/JuddApatow (''Film/TheFortyYearOldVirgin''), starring Creator/SethRogen (''Film/PineappleExpress'', ''Film/ObserveAndReport'') and Katherine Heigl (''Series/GreysAnatomy'', ''Film/TwentySevenDresses''.)

Ben Stone (Creator/SethRogen) is a [[TheSlacker carefree stoner]] who lives with his [[TheStoner eccentric]] [[TrueCompanions group of friends]]. He has no job, no money, and very little ambition. In fact, his main concerns in life are getting high, and working on a website that he and his buddies designed which catalogs the nude scenes of female celebrities in popular cinema. Little does he know that his life is about to be irrevocably changed when he goes out to a club one night and meets...

Allison Scott (Katherine Heigl), who is an up and coming entertainment journalist for the E! television network, out celebrating her recent promotion to an on-camera position. Though young and attractive, Allison has had little time for dating as her focus has been [[{{Workaholic}} entirely on work]] and advancing her career. The two meet while trying to get the attention of the club's bartender, and they hit it off. Several hours (and many drinks) later, a tipsy Allison invites Ben home with her, where they have what they believe to be a [[WhatDidIDoLastNight drunken one-night stand]].

The next morning, Ben and a remorseful Allison say their good-byes, thinking that they will never see each other again. This plan is drastically altered when, 8 weeks after her encounter with Ben, Allison starts feeling ill in the mornings and she panics when she realizes that she missed her period last month. A few dozen pregnancy tests later, her worst fears are confirmed: she's pregnant, and the only man that could possibly be the father is the last man she would ever see herself having a long-term relationship with.

''Film/ThisIs40'' is a SpinOff movie or "sort-of sequel" written and directed by Apatow that follows the lives of Allison's sister Debbie (Apatow's real life wife Leslie Mann) and her husband Pete (Creator/PaulRudd) five years later. It was released in December 2012.

!!This film provides examples of:

* AmbiguouslyGay: Jonah in a deleted scene.
* BabiesMakeEverythingBetter: Over the course of the film, Allison's pregnancy transforms Ben from a hopeless stoner with no future into an at least passable father figure.
** A better example of TropesAreNotBad than most uses of this one though. The movie takes great pains to show that Ben has to really work to sort out his life, instead of simply becoming a father and fixing his life instantly. It's more of a low-key version of EarnYourHappyEnding.
* BingeMontage: Ben and Pete on mushrooms in UsefulNotes/LasVegas, complete with a FishEyeLens effect during the Cirque du Soleil show.
* BlowingSmokeRings: Ben is blowing one in the opening scene.
* BrainBleach: "I shouldn't have gone in there!"
* ButWeUsedACondom: While Ben was drunkenly fumbling to put a condom on before their encounter, he misread Allison's frustrated protest of ''"Just do it already!"'' to mean something else entirely.
* CelebrityParadox: Steve Carell appears in the movie as himself. Since one of Carell's most famous roles is ''Film/TheFortyYearOldVirgin'' which costarred Seth Rogen, that would suggest that the "real" Seth Rogen exists in this movie's universe.
* ChekhovsSkill: Ben eventually gets around to read the baby books and impresses Allison when she falls in labor and calls for his help.
* {{Improv}}: Much of the dialogue was improvised by the actors or fed to them in the moment by Creator/JuddApatow just before a take.
* CleanPrettyChildbirth: Played straight; while it does show a crowning vagina twice, no blood or other liquids or solids are shown.
* ClusterFBomb: Ben's rant at the missing doctor. [[spoiler:Just when Allison is going into labor.]]
-->'''Ben Stone:''' Hey Doc Howard, Ben Stone calling, guess what the fuck's up? Allison is [[spoiler:going into labor]] and you are not fucking here, you know where you're at? You're at a fucking Bar Mitzvah in San Francisco you motherfucking piece of shit, and you know what I'm gonna have to do now? I'm going have to kill you, I'm gonna pop a fucking cap in your ass. You're dead, you're Tupac, you are fucking Biggie you piece of shit, I hope you fucking die or drop the chair and kill that fucking kid... I hope your plane crashes, peace fucker!
** The movie has enough F-words to put in a [[http://www.youtube.com/watch?v=Tx25O8lEn_E compilation]].
* ComingOfAgeStory: Ben is almost hopelessly immature in the beginning of the film, but he soon has to face the reality of being a parent.
* CouldSayItBut: Allison clarifying that the producers are asking her to lose weight. "No, no, legally we can't ask you to do that. Just make it...tighter."
* CreativeClosingCredits: Baby photos of the cast and crew are shown during the closing credits.
* [[invoked]]DudeNotFunny: James Franco is less than amused by Allison's vomiting mid-interview.
* DuelingMovies: Discussed InUniverse. Ben mentions several movies that came in pairs: ''Film/{{Volcano}}'' and ''Film/DantesPeak'', ''Film/DeepImpact'' and ''Film/{{Armageddon}}'', ''Wyatt Earp'' and ''Film/{{Tombstone}}''.
* ExactWords: "Just do it already!"
* GoodGirlsAvoidAbortion: Allison's mother mentions the possibility of abortion, but she decides to bring the baby to term.
* HollywoodPudgy: In-universe example. When Allison's boss gives her a promotion, he asks her to "tighten up", aka lose weight. Allison is by no means pudgy.
** The guy from Series/AmericanIdol playing...well...Himself. But doing one of his other jobs.
* ItsBeenDone: The protagonists work for months on a website where one could check on celebs to look up movies/shows where they go nude, including the ''relevant'' time marks. Then somebody comes a long to tell them that there is already such a [[http://www.mrskin.com website]].
* ItsNotPornItsArt: Ben reacts like this to Pete when latter calls his movie business "porn".
* LawOfInverseFertility: All it takes is a one-night-stand.
* LetsJustBeFriends: Allison suggests this to Ben at some point.
* MeaningfulName: Ben ''Stone''.
* AMistakeIsBorn: A girl gets [[TitleDrop knocked up]] after a OneNightStand.
* MistakenForCheating: Pete. Turns out that he's just been doing things like playing in a fantasy football league or going to the cinema alone just get have some time away from Debbie.
* MoodWhiplash: Purposefully invoked while Ben and a heavily pregnant Alison are trying to have sex. Ben is afraid that he'll hit the baby in the head with his penis, and after convincing her to go doggie-style ("we don't have to go outside or anything") he feels the baby kick his hand and freaks out. All very amusing, but the scene ends with a distraught Alison promising him that he'll never have to do it again.
* MorningSickness: The vomiting Machete happens while the female lead is conducting an interview with James Franco, who assumes it's a prank.
* NobodyThinksItWillWork: He's an overweight pothead layabout. She's a hot media figure. They are both the best thing to ever happen to each other.
* NoPreggerSex: Ben has this fear in the middle of doing the deed.
** That didn't stop him from multiple attempts, of course...
* PaedoHunt: Debbie uses the internet to locate registered sex offenders in the neighborhood, convinced that they pose a threat.
* PrecisionFStrike: While the movie has really filthy dialogue, hearing ''Ryan Seacrest'' curse in the movie is ''really'' surprising.
** "Well..fuck!" by Paul Rudd's character who barely curses in the movie.
* PunctuatedForEmphasis: "My room, your area, stay in your area, stay out of my room, '''back... the... fuck... off.'''"
* SecondActBreakup. Between Allison and Ben, as she thinks they are not made for another.
* ShiksaGoddess: Allison to Ben.
* SpiritualSuccessor: Rumor has it that this film became this when scheduling conflicts prevented it from being a direct sequel to the successful Apatow film ''Film/The40YearOldVirgin'', which Rogen had a supporting role in.
* TheStoner: Ben and his roommates spend most of their spare time smoking weed.
* TakeThat: In a deleted scene, Jonah goes off on a big spiel about how pretentious ''Film/BrokebackMountain'' is.
** "[[Series/{{LOST}} Matthew Fox]], you know what's interesting about him, right? Nothing."
* TerribleIntervieweesMontage: A variant involving gynecologists. Allison and Ben are seeing several doctors to find the right one.
* ThreeMonthOldNewborn: Attempted aversion/bizarre example: Judd Apatow wanted to shoot an actual birth; Anne Hathaway is said to have turned down the project because of this. Apatow abandoned this plan when he realized that he would need a worker's permit for the unborn child.
* TimePassageBeard: Martin, due to TheBet. By the length of his beard we can tell how far the pregnancy is.
* TrailersAlwaysSpoil: Subverted; the trailer has a specially-shot alternate take of Alison revealing her pregnancy, which Ben reacts to by shrugging and saying "congratulations," in order to make the PrecisionFStrike in the actual scene that much funnier.
* UglyGuyHotWife: The movie has the chubby Ben Stone who is also being a gigantic loser with no self esteem about his appearance, paired with the conventionally beautiful, confident Katherine Heigl. Most of the characters wonder WhatDoesSheSeeInHim.
* VivaLasVegas: Ben and Peter have a good time there.
* WatchItStoned: Used in-story when, during their Vegas jaunt, Ben and Pete take psychedelic mushrooms before seeing Creator/CirqueDuSoleil's ''Theatre/{{Mystere}}''.
* WhatDidIDoLastNight: After a night of hard drinking, Ben doesn't remember anything.
* WhatTheHellHero:
** After spending much of the movie keeping the sex of the baby under wraps per Allison's request, Ben purposely tells her what it is during a heated argument just to stick it to her.
** His "Fuck you hormones" speech after she made him walk three miles to the hospital definitely qualifies.
* YaoiFangirl: Fan boy actually. One of Jonah's major complaints about ''Film/BrokebackMountain'' in the deleted scene is the significant ''lack'' of graphic sex between the two leads.