History ActorAllusion / HowIMetYourMother

* In a season 6 episode, Robbie Amell plays a character who goes by "Scooby" and acts like a dog. He was in two Sccoby Doo movies.

* Sarah Chalke (Stella) [[{{Series/Scrubs}} once again]] plays a HospitalHottie who becomes a RunawayBride to get back with a guy she had a relationship with in the past.

* Another episode had Barney (Creator/NeilPatrickHarris) using actors to play the roles of his family. About his [faked] son, he comments that "Child actors were better 20 years ago," which is exactly what (and when) Harris used to be.

* Lily has a crush on Creator/MilaKunis. Perhaps she saw her in ''ForgettingSarahMarshall'', written by and starring her husband (Creator/JasonSegel).

* At the end of Ten Sessions, the tattoo removal doctor tells Ted to call her if he ever ends up with a dolphin tattoo on his right ankle, which is the tattoo that AlysonHannigan has in real life.

** In the same episode, when asked about the song that Robin had done, "PS I love you", Coulier said "Why do they always think it's about me?". Coulier was (allegedly) the subject of AlanisMorissette's song ''You Oughta Know'', and Alanis was the inspiration for Robin [[spoiler: Daggers]]

* In the same episode, when asked about the song that Robin had done, "PS I love you", Coulier said "Why do they always think it's about me?". Coulier was (allegedly) the subject of AlanisMorissette's song ''You Oughta Know'', and Alanis was the inspiration for Robin [[spoiler: Daggers]]

* During their conversation in "Garbage Island" when Ted thinks The Captain (played by Kyle [=MacLachlan=]) suspects him of [[spoiler: breaking up The Captain and Zoey's marriage]], Ted spits out his brandy in shock and tries to cover it by saying "That's some damn good brandy." This is likely a nod to [=MacLachlan=]'s role as Special Agent Dale Cooper on ''TwinPeaks'', who repeatedly exclaims some variation on "That's some damn good coffee!"; the first time he does so is after a SpitTake.

* Sarah Chalke (Stella) [[{{Series/Scrubs}} once again]] plays a HospitalHottie who becomes a RunawayBride for a guy she had a relationship with in the past.

** Both college-age Marshall and Nich are TheStoner.

* Another possible coincidence for "The Mother" (Cristin Milioti), who earned a Tony nomination as [[{{Once}} "Girl"]]:

* Another one is with Creator/AlysonHannigan's character. When having cold feet before her marriage, one of the items on the list of experiences to have is a big lesbian experience. Her most famous role is lesbian witch Willow from ''Series/BuffyTheVampireSlayer''.

* Lily has a crush on MilaKunis. Perhaps she saw her in ''ForgettingSarahMarshall'', written by and starring her husband (Creator/JasonSegel).

* In the AlternateUniverse trailer for Season 9 where Future!Ted has been telling his kids the story of how he met their mother for literally 8 years, the Son complains, "The only girl I've seen in the past 8 years has been my sister! And it's making me think stuff...bad stuff." This could allude to the fact that the Son's actor, DavidHenrie's StarMakingRole was in ''WizardsOfWaverlyPlace'', where the chemistry between him and his co-star SelenaGomez was so hot they became a FanPreferredCouple...despite the fact they were playing [[IncestYayShipping brother and sister.]]