They reportedly made out in full view of everyone at the Saturday Night Live after party over the weekend.

But it seems that it wasn’t the first time Scarlett Johansson and Colin Jost had shared a romantic moment.

‘It’s been going on for a bit’ a source told E! News of the duo’s fling.

Not a one-off: Scarlett Johansson and SNL star Colin Jost’s fling has been going on for a while, according to sources on Monday

‘They’re not in a relationship, but they have fun together. They like each other, but it’s not exclusive – at least not at this point.’

Scarlett, who is currently in the midst of a divorce, had a passionate make out session with the Weekend Update co-host on Saturday night, according to PageSix.

The 32-year-old Her star is said to have been so taken with the comedian that she got close to him.

The party was held at the Rockefeller Center ice rink, which went on into the early hours of Sunday.

A source told PageSix: ‘Scarlett and Colin were making out at the bar at the SNL season finale party at 30 Rock.

Having fun: Scarlett is said to have enjoyed a passionate make out session with the SNL star at the finale after party on Saturday night

‘They would make out a bit, then go back to talking. They were at the bar in front of everyone.

‘They made out at least twice . . . Then they went back to talking and hanging with other people.’

Another source said: ‘Scarlett and Colin were flirting and canoodling in full view of everyone at the after-party, including the SNL cast and crew. They were laughing and seemed to really hit it off.’

Divorce: She split from French husband Romain Dauriac back in March

The Avengers star had been on the show to reprise her turn as Ivanka Trump, where she appeared alongside semi-professional Donald Trump impersonator Alex Baldwin.

She first played the part when she hosted SNL for the fifth time in March.

Scarlett has been in the process of divorcing French husband Romain Dauriac, who is father to her two-year-old daughter Rose, since March.

Around the time they split she said: ‘I think the idea of marriage is very romantic; it’s a beautiful idea. And the practice of it can be a very beautiful thing.

‘I don’t think it’s natural to be a monogamous person. I might be skewered for that, but I think it’s work. It’s a lot of work.’

For his part Colin, 34, is hardly a stranger to dating showbiz stars, as he was previously in a relationship with Parks And Recreation star Rashida Jones.

The Avengers star had been on the show to reprise her turn as Ivanka Trump, where she appeared alongside semi-professional Donald Trump impersonator Alex Baldwin