Booth rose to prominence in 2010 following his performance as the pop star Boy George in the BBC Two drama Worried About the Boy. He underwent a physical transformation for the role, shaving off his eyebrows and wearing heavy makeup. Booth met Boy George during filming, with the singer remarking: "He just gets it. There's something about him that reminds me of me when I was 17. " Howard Male of The Arts Desk was reminded of Cillian Murphy's performance in Breakfast on Pluto and praised the "emotional resonance" Booth brought to "his occasionally uncannily accurate portrayal of George. " Writing in The Daily Telegraph, Ceri Radford said Booth delivered a "mesmerising" performance: "He offered a convincing portrayal of O'Dowd as a beautiful young man who oozed ambiguous sex appeal and protected his feelings with a carapace of prickly wit. " Mike Higgins of The Independent declared Booth "a discovery": "Moving, witty, he also got the singer's wheezy enunciation down pat. "