Not only did the US gay rights activist have a front row poolside seat for the ITV show, but the pair later enjoyed a celebratory dinner together.
Tom posted a photo of the two of them cosied up in Soho restaurant on Instagram, which marked the first time they have publicly acknowledged their ties to each other.
Dustin also posted congratulatory messages to Tom on Twitter and Facebook, later posting a picture of a cake decorated with the words 'I love Tom' on it, writing beneath: "I concur. tomdaley1994 fans are the SWEETEST #forgetthediet."
Tom revealed he was in a relationship with a man last month in an emotional coming out video posted on YouTube.
He later admitted it had been "love at first sight" during an interview about his relationship on 'The Jonathan Ross Show'.