The openly gay international rugby player entered the Big Brother house on Thursday evening.
Thomas retired from rugby in 2007 after captaining Wales’ World Cup effort.
Coming out in December 2009, Thomas told the Daily Mail ‘Just because you are gay, it doesn’t mean you fancy every man who walks the planet.
‘I don’t want to be known as a gay rugby player. I am a rugby player first and foremost. I am a man.’
‘I’d love for it [being gay], in 10 years’ time, not to even be an issue in sport, and for people to say: ‘So what?’’
Thomas joins ex-EastEnder Natalie Cassidy, X Factor contestant Frankie Cocozza, former glamour model Nicola McLean, Hollywood actor Michael Madsen and TV presenter Denise Welch in the Big Brother house.