Throw It In: An unintentional Funny Background Event on the DVD: the gavel head breaks and flies off (violently!) when the Queen of Hearts tries to end the Mad Hatter's and March Hare's testimony. Cue some quick improvisation from both the King and Queen, who initially aren't sure where the gavel head even is, along with mimed amusement from the Hatter once he notices what's happening.
Not to mention the fact that one of the Tweedles is played by Robbie "Rubeus Hagrid" Coltraine.
The 1985 version also features a lot of names in the cast, like Sammy Davis Jr as the Caterpillar, Telly Savalas as the Cheshire Cat, Carol Channing as the White Queen, Roddy McDowall as the March Hare, and Ringo Starr as the Mock Turtle.
A 1933 version includes W.C. Fields as Humpty Dumpty, Cary Grant as the Mock Turtle and Gary Cooper as the White Knight, among other stars.
The 1966 version for the BBC is full of well-known British actors and comedians, including Sir John Gielgud, Peter Sellers, Leo McKern, Alan Bennett, Peter Cook, and Sir Michael Redgrave.
Dawson Casting: Alice is pre-pubescent in the books but most TV and movie adaptations depict her as a teenager or twenty-something (e.g. Fiona Fullerton). The few exceptions are 12-year old Sarah Sutton (UK) in 1974, 9-year-old Natalie Gregory (USA) in 1985 and Krystina Kohoutova (Czech Republic) in 1988). May Clark, the first actress to portray Alice in film, was 14 at the time (1903).
Kate Beckinsale plays Alice in a 1998 version of Through the Looking-Glass. It's interesting to note that the film starts out with Beckinsale reading the story to her daughter and that when she becomes Alice, she is "seven and a half exactly".
Janet Waldo, a.k.a. Judy Jetson, was 42 when she voiced Alice in the Hanna-Barbera version. Of course, adults voicing children is very common in the voice acting industry and the character was drawn as a preteen, but it still might make her the oldest person to play Alice.