The only actor to play two forms of the Doctor in the 12 count regeneration cycle was David Tennant.
Matt Smith who played the Doctor after Tennant even made a joke about how much vanity the previous doctor version had and had to repeat himself in his next regeneration.
HOWEVER, no actor who has quit playing the Doctor has returned to play the role again. But with that being said, Tom Baker, who played the role of the 4th Doctor, did make an appearance on "The Day of the Doctor" and told Matt Smith's version of the Doctor that he might or might not be a future version of the Doctor "trying on familiar faces".
Matt Smith is the new doctor who!!!HE IS ALSO THE YOUNGEST EVER!!!
Yes twice
He is the one actor who will have played the character in the movies more than the others.
maybe, you never know
William Hartnell, who played the Doctor from 1963 to 1966, and only him and the Second Doctor (Patrick Troughton) were in black and white.
If you mean the first ever episode, that was An Unearthly Child. It came out in 1963, it was black and white and the Doctor was played by William Hartnell.
Yes twice and FSU won both times
The Gooch was only ever mentioned by the other characters. He was never actually seen on screen, so no actor ever played him.
In phineas and ferb, phineas is played my Vincent Martella. Ferb is played by Thomas Brodie Sangster. He is my most Favorite actor ever!
The current actor playing Doctor Who until December 2017 is played by Peter Capaldi also known as the Twelfth Doctor. BBC recently announced the next Doctor Who (13th Doctor) as Jodie Whittaker who becomes first ever female Time Lord to play the role.Peter will step down as the Doctor at the end of the year after starring in his final season, and his regeneration scene is expected to take place during the 2017 Christmas special.
Twice - in 1982 and 1987. In both cases, part of the season was played.
The 11th Doctor is played by Matt Smith, the youngest ever actor to take on the role. He has been in the job since 2009. See related link. He has announced that he intends to leave the show later on in 2013, after the 50th Anniversary celebrations and special episodes. As to who his successor will be, nobody knows yet. Several actors have portrayed the Doctor, that are not officially counted. See Related Links: uncounted Doctor Who actors. See below for 12th Doctor rumors.