In honor of Chad Everett, TV doctors
- Joe Gannon (Everett, Medical Center)
- John Carter (Noah Wylie, er)
- Michaela “Mike” Quinn (Jane Seymour; Doctor Quinn, Medicine Woman)
- Dr. Bombay (Bernard Fox, Bewitched)
- Dr. Gregory House (Hugh Laurie; House)
- Leonard “Bones” McCoy (DeForest Kelley, Star Trek)
- John “J.D.” Dorian (Zach Braff; Scrubs)
- Marcus Welby, M.D. (Robert Young; Marcus Welby, M.D.)
- Cristina Yang (Sandra Oh, Grey’s Anatomy)
- Hiram Baker (Kevin Hagen, Little House on the Prairie)
- Dr. Zachary Smith, Doctor of interstellar environmental psychology (Jonathan Harris, Lost in Space)
- John Zoidberg (Billy West, Futurama)
Since Rhythmdvl accidentally left out my Doogie Howser answer for #11, that actually puts Little Nemo in the #13 spot for the new topic.
I burning your Doogie!
Sorry 'bout that–not quite a simulpost but close enough for me to miss.
Okay, I’ll do one then (pretending Doogie was #13, and in honor of him
):
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
Leaffan
11607
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
Blkshp
11608
In honor of Chad Everett, TV doctors
- Joe Gannon (Everett, Medical Center)
- John Carter (Noah Wylie, er)
- Michaela “Mike” Quinn (Jane Seymour; Doctor Quinn, Medicine Woman)
- Dr. Bombay (Bernard Fox, Bewitched)
- Dr. Gregory House (Hugh Laurie; House)
- Leonard “Bones” McCoy (DeForest Kelley, Star Trek)
- John “J.D.” Dorian (Zach Braff; Scrubs)
- Marcus Welby, M.D. (Robert Young; Marcus Welby, M.D.)
- Cristina Yang (Sandra Oh, Grey’s Anatomy)
- Hiram Baker (Kevin Hagen, Little House on the Prairie)
- Dr. Zachary Smith, Doctor of interstellar environmental psychology (Jonathan Harris, Lost in Space)
- Witch Doctor (Eddie Little Sky, Gilligan’s Island, 1966)
NDP
11609
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
I think we’ve done this one before.
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
Oh, probably. But that’s nothing new 
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
- Drew Barrymore
Blkshp
11615
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
- Drew Barrymore
- Robert Blake
Hold on a second. Ray Liotta? His first acting job was a soap opera when he was 24.
anyrose
11617
to some of us, that may as well be “child” age 
AWB
11618
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
- Drew Barrymore
- Robert Blake
- Mickey Rooney
anyrose
11619
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
- Drew Barrymore
- Robert Blake
- Mickey Rooney
- Natalie Wood
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
- Drew Barrymore
- Robert Blake
- Mickey Rooney
- Natalie Wood
- Ryan Gosling
Former Mousketeer - first appeared onscreen at age 12.
Former child actors who made the transition to success as adult actors:
- Neil Patrick Harris
- Jackie Cooper
- Jodie Foster
- Natalie Portman
- Christian Bale
- Ron Howard
- Ray Liotta
7b. Christina Ricci
- Drew Barrymore
- Robert Blake
- Mickey Rooney
- Natalie Wood
- Ryan Gosling
- Alyssa Milano
I still say Liotta shouldn’t count, so I’ve added an alternative choice
New category: Countries in NATO
- The United States