Matthew Lewis had taken part in Celebrity Mastermind.
The episode in which he features, will air tonight at 7pm (GMT) on BBC1.
Matt will compete with other celebrities to win money for their chosen charity.
Presented by John Humphrys, the programme involves contestants answering questions on a specialised subject for two minutes, followed by general knowledge trivia for the same length of time.
Matt's chosen subject is 'the life and music of Oasis.
Photos of Matt on the show can be seen here.
Source: www.snitchseeker.com