Vito Scotti- (I. Vitteloni) appeared on the Monkees TV show and in hundreds of other sitcoms in the 60s (The Addams Family, Zorro, Bonanza, Twilight Zone, My Favorite Martian, Gilligan's Island, The Flying Nun (with Sally Field. Heh)). After HEAD, he was one of the voices in "The Aristocats", he was in "The Godfather", "Get Shorty". Basically, he was always cast as an Italian dude. He's the Italian guy in HEAD who surrenders to Micky, you know.
June Fairchild- (The Jumper) was the girlfriend of Danny Hutton, who tried out for The Monkees and eventually ended up in Three Dog Night. June supposedly came up with their band name. She also was in "Drive, He Said" (which Nicholson directed) with I.J Jefferson. She was also in "Up in Smoke", the Cheech and Chong classic. June's tale is sad, though. This year, the L.A Times did a report on her rise and fall from acting when it was discovered this year that she was living in L.A's Skid Row, and she was homeless. Unfortunately, the same day she was featured in the paper, she was arrested for an open container violation and is now in jail. I feel really sad about this, and it's almost prophetic. cos in the movie she tries to commit suicide. Hmm.
Helena Kallianiotes- (Belly Dancer) Helena was a belly dancer at some Greek nighclub in the early 60s, and it was then when she became friends with Jack Nicholson. Gee, I wonder how SHE got cast in HEAD. She saw her career begin with HEAD, and was uncredited as a belly dancer, but that small role lead to a role in "Five Easy Pieces" with fellow HEAD castmembers Jack Nicholson and Toni Basil. She is still really good friends with Jack Nicholson and even lived in his guesthouse for a really long time.
Tiger Joe Marsh- (Security Guard) was in a Monkees episode before appearing in HEAD.
Jon C. Andersen- (Himself) was seen in a cameo in HEAD and was previously a director/writer on the Monkees TV show.