Who plays 'the beast' in disney's live action movie beauty and the beast?
Before the release of the film, Bill Condon refilmed one certain sequence in the "Days of the Sun" number, due to confusion among test audiences caused by actress Harriet Jones, who looked similar to Hattie Morahan, who portrayed Agathe. In the original version of the scene, it was Jones's character, the Prince's mother, who sings the first verse of the song, with Rudi Goodman playing the young Prince and Henry Garrett playing his father; but in the reshot version of the scene, the singing part is given to the Prince (now played by Adam Mitchell). The King was also recast to Tom Turner, although Harriet Jones was still the Queen, albeit with dark hair. Both Goodman and Garrett's names were mistakenly featured in the original theatrical release's credits, but was later corrected in home releases.
Who plays the young 'the beast' in disney's live action movie beauty and the beast? 
 Adam Mitchell
Beauty and the Beast (2017 film)
Beauty and the Beast is a 2017 American musical romantic fantasy film directed by Bill Condon from a screenplay written by Stephen Chbosky and Evan Spiliotopoulos. Co-produced by Walt Disney Pictures and Mandeville Films, it was filmed in the UK with predominantly British principal actors. The film is a live action adaptation of Disney's 1991 animated film of the same name, itself an adaptation of Jeanne-Marie Leprince de Beaumont's 18th-century fairy tale. The film features an ensemble cast that includes Emma Watson and Dan Stevens as the eponymous characters with Luke Evans, Kevin Kline, Josh Gad, Ewan McGregor, Stanley Tucci, Audra McDonald, Gugu Mbatha-Raw, Ian McKellen, and Emma Thompson in supporting roles.
Who plays the adult 'the beast' in disney's live action movie beauty and the beast? 
 Dan Stevens
Beauty and the Beast (2017 film)
Beauty and the Beast (2017 film)
https://en.wikipedia.org/wiki/Beauty%20and%20the%20Beast%20%282017%20film%29
Dan Stevens as Beast, a cold-hearted, selfish, unkind prince who is transformed into a beast and forced to earn back his humanity by learning to truly love and be loved in return, as well as to give rather than take. Stevens portrays the character through motion-capture.[13][14]
Beauty and the Beast (2017 film)
Adam Mitchell portrays the younger version of the prince.
Beauty and the Beast (2017 film)
In the 2017 Beauty and the Beast film, the character Beast, a prince who was transformed into a beast, is played by Dan Stevens with the young prince played by Adam Mitchell.  