The adorable couple stepped out in matching outfits- jeans, leather jack and blue shirt combo- at the Battersea Power Station Inaugural Annual Party.
The appearance was the couple’s first official outing together since it was revealed that Tom was dating the Oscar winning screenwriter.
The 19-year-old bronze medalist came out in an emotional video last year, where he also revealed that he had already found love… with a man.
Tom and Lance met earlier in 2013 and he revealed in an interview with Jonathan Ross that it was him that made the first move.
He admitted in his candid youtube video that the relationship came as a shock to him, telling fans: ‘It did take me by surprise a little bit. It was always in the back of my head that something like that could happen.’
‘But it wasn't until spring this year that something just clicked. It felt right and I thought 'OK'.’
‘And my whole world changed there and then.’
Tom has recently been on our TV screens after filming a travel series with best friend Sophie Lee.