Simon Cowell looks upbeat as he took part in ICAP’s annual charity day on Thursday at the trading firm’s London headquarters.

The 64-year-old music mogul dressed down in a black T-shirt and joined a slew of celebrities in support of ICAP’s 31st annual charity day.

He laughed and chatted with the throng while wearing orange-tinted spectacles, even posing with comic Keith Lemon. Simon eagerly participated in phone chores, joining the workers behind the computers to help with the event’s fundraising efforts, which benefited charities all around the world.

The Britain’s Got Talent judge was joined at the charity event by celebs such as Joan Collins, Alex Scott, and Billie Piper. Alex smiled as he posed with actress Billie Piper, who matched the former England footballer’s style by wearing a black blazer with glittering accents.

ICAP Charity Day has earned approximately £160 million for over 2,900 charity causes worldwide since its beginning in 1993. The event distributes 100% of the company’s income and broker commissions to benefit certain philanthropic projects.