Here's my list. If I missed someone, add it!

Dabbs Greer- Reverend Alden: Little House on the Prairie
Natalie Schafer- Lovey Howell: Gilligan's Island
Ken Berry- Vinton: Mama's Family; F-Troop; Mayberry RFD
Sandra Gould- Gladys Kravitz: Bewitched
Melissa Sue Anderson- Mary: Little House on the Prairie
Desi Arnaz, Jr.- Craig: The Lucy Show
Marcia Wallace- Carol Kester: Bob Newhart Show
Jackie Coogan- Uncle Fester: The Addams Family
Gordon Jump- Arthur "Big Guy" Carlson :WKRP in Cincinnatti
Jim Backus- Thurston Howell III: Gilligan's Island; Mr. Magoo
Marion Ross- Mrs. C.: Happy Days
Herbert Anderson- Henry Mitchell: Dennis the Menace
Allan Melvin- Barney Hefner: All in the Family; Drooper: Banana Splits
Pamelyn Ferdin- Odd Couple; Paul Lynde Show; voice of Lucy Van Pelt, Charlie Brown
Paul Winchell- Banana Splits, Jerry Mahoney Show & many voices

William Frawley--Fred Mertz (I Love Lucy) and Bub O'Casey (My Three Sons)
Shelley Fabares--Mary on the (Donna Reed Show) and Christine on (Coach)
Eleanor Donahue--Father Knows Best, and Andy Griffith
Angela Cartwright--Make Room for Daddy (Linda) and Lost in Space (Penny)
Larry Hagman--I Dream of Jeannie (Major ?) and Dallas (J.R. Ewing)
Patrick Duffy--Dallas (Bobby Ewing) and Step by Step (Frank Lambert)

(Many more who I can't think of at the moment)

Hi Yooch- I was just listing the actors who appeared on the Brady Bunch! I should have mentioned that.

Here's my list. If I missed someone, add it!

Dabbs Greer- Reverend Alden: Little House on the Prairie
Natalie Schafer- Lovey Howell: Gilligan's Island
Ken Berry- Vinton: Mama's Family; F-Troop; Mayberry RFD
Sandra Gould- Gladys Kravitz: Bewitched
Melissa Sue Anderson- Mary: Little House on the Prairie
Desi Arnaz, Jr.- Craig: The Lucy Show
Marcia Wallace- Carol Kester: Bob Newhart Show
Jackie Coogan- Uncle Fester: The Addams Family
Gordon Jump- Arthur "Big Guy" Carlson :WKRP in Cincinnatti
Jim Backus- Thurston Howell III: Gilligan's Island; Mr. Magoo
Marion Ross- Mrs. C.: Happy Days
Herbert Anderson- Henry Mitchell: Dennis the Menace
Allan Melvin- Barney Hefner: All in the Family; Drooper: Banana Splits
Pamelyn Ferdin- Odd Couple; Paul Lynde Show; voice of Lucy Van Pelt, Charlie Brown
Paul Winchell- Banana Splits, Jerry Mahoney Show & many voices


Great list! I can't think of any more.

It was pretty cool that Sherwood had both Jim Backus and Natalie Schafer appear on the Brady Bunch... I think Sherwood should have made it a point to have every member of the Gilligan's Island cast on the BB for at least one episode, even if it was just a bit/cameo role.... and who knows, maybe he did try to get some other G.I. cast members involved, but wasn't able to pull it off.

Joe Conley delivered a big box to the Bradys in "The Hero," in which Peter saved the little girl from a falling bookcase. Mr. Conley went on to play the role of Ike Godsey on The Waltons. (When I started watching TW I used to get him and Ralph Waite/the father mixed up.)

Natalie Schafer- Lovey Howell: Gilligan's Island
Jim Backus- Thurston Howell III: Gilligan's Island; Mr. Magoo


Both from GI :D

That was not just the second time Jim Backus worked with Sherwood Schwartz either. Sherwood was on of the head writers on Jim Backus' 1952 series I Married Joan.

Also, JB plays the almost exact charter in the Grand Canyon saga as he does on the dream sequence of the GI episode "The Sweepstakes" Jim Backus said that was his favorite episode so I am sure he was happy to play the almost exact same role again.

Rita Wilson was the cheerleader who beat Marcia and Jennifer, the girl who kept calling Greg "Greggie", for head cheerleader at Westdale High.