I didn't realize he/she was in that

Indeed.



Speaking of the Reba TV show, the woman who played the wacky sidekick (Melissa Peterman) was also one of the prostitutes on Fargo.

 

I just saw Josh Lucas as one of Christian Bale's fellow stockbrokers in "American Psycho."

 

Great pull. I had no idea on that one. I always loved the Midwestern-accented "Go, Bears!"

 

Just watched the credits on "A Bug's Life." Hayden Panettiere plays the child ant. Had no idea.

 

You mean as Mork?

 

That's like saying Penny Marshall and Cindy Williams were on Happy Days as Laverne & Shirley.

 

Matt LeBlanc was on "Friends" before going on to star in "Joey."

 

Other famous people who appeared on Happy Days (as later-season regulars or as guest stars during the run):

Heather O'Rourke
Billy Warlock
Dick Van Patten
Gary Marshall
Richard Moll
Rita Wilson
Hank Aaron

 

One of the more amaznig transformations in terms of growing up on TV was Madeline Zima -- from a child on The Nanny to Mia on Californication.

 

A very short Shia Labeouf is in an episode of Freaks and Geeks. He played the mascot who got hurt and Sam took over for him.

 

Leslie Bega, who played Tony's girlfriend Valentina on The Sopranos (the one he stole away from Ralphie who later got burned in the fire that killed the racehorse) was one of the students on "Head of the Class."

 

Actually, he was older brother Chuck Cunningham during the first season.
He was always dribbling a basketball.