They were rumoured to have rekindled their relationship earlier this month.
And Russell Brand then fuelled reports that he was back with Jemima Khan by revealing that he was in a relationship.
But now the pair appear to have officially confirmed their reunion, by posing together at a screening in London on Wednesday night.
Russell, 38, and Jemima, 39, looked happy and loved-up as they posed for photographers at the screening of new documentary Unmanned: America's Drone Wars.
Jemima wore a pair of tight leather trousers and loose-fitting grey T-shirt for the occasion, while Russell went for a typically eccentric ensemble in a patterned black and white shirt and skinny black jeans, with a printed black blazer.
The couple's outing comes after Jemima posted a shot of Russell with her dog on her Twitter page - the latest indication that the pair were giving their romance another go.
The 38-year-old comedian was seen posing in front of a wall upon which his distinctive face had been spray-painted.
Alongside the shot, in which her fluffy white dog could also be seen, Jemima tweeted: 'Brandalism! Brian’s the first convert.'
Brian cut something a familiar figure having made his social networking debut on Brand’s account last month.
The adorable pooch is pictured in a shot added by the bearded funny-man on October 23, along with the tweet: ‘On me way to Plymouth with a dog that looks like a Nazi mascot #MessiahComplex.’
On Monday, Brand was pictured with Brian as he made his way out of Shoreditch House following a night out with pals in East London.
That same night he confirmed that he is off the market, saying: 'I’m in a relationship at the moment. I’m off to see my girlfriend.’
The Get Him To The Greek star has remained tight-lipped about his love life since divorcing Katy Perry in February 2012 after 14-months of marriage.
Writing in the Guardian last month he admitted, in his own inimitable way, that he was ‘presently beleaguered by a nerdish, whirling dervish’ and was ‘eschewing all others’ in order to be with her.