Isla Fisher would rather not know what Sacha Baron Cohen gets up to as Borat.

Sacha Baron Cohen and Isla Fisher

Sacha Baron Cohen and Isla Fisher

The 44-year-old star worries too much about the dangerous situation her husband - who recently reprised the character for 'Borat Subsequent Moviefilm' - puts himself in when he's playing his outrageous character so her spouse has learned not to tell her what he's planning until filming is complete.

Speaking to Australia's Herald Sun newspaper, she said: "I'm lucky in that I'm not privy to the information usually until it happens, so I don't see that he was at a gun rally until he's home safe.

"I think he's learnt the hard way that if he gives me the information up front, that I put the kibosh on it.

"I find out what's happened afterwards, and that's how I can sleep at night, otherwise I'd be too worried."

The couple have been married for 10 years and have kids Olive, 12, Elula, nine, and Montgomery, five, together, but the 'Wedding Crashers' star admitted sometimes her man can be a bit too embarrassing.

She previously remembered a moment she and Sacha went to a premiere for a film Jack Black had produced, where a woman made a long speech, followed by the 'School of Rock' star making a short one before the film started.

Isla recalled: "Jack Black said, 'Yeah, if I would've known the movie was going to be so great, I would've made a longer speech.'

"And then Sacha said, 'Yeah, like that woman who wouldn't shut up with the massive boobs.' And then Jack said, 'That was my mom.'

"And then Sacha said, 'Well, big boobs are great! Isla wants big boobs! You want big boobs right, babe?' "

However, Isla - who co-starred with her husband in 'Grimsby' in 2016 - has also praised Sacha for his dedication to his craft and characters.

She explained: "He's such a perfectionist. He'll do everything and anything to get the best joke possible into the movie, so it was definitely inspirational.

"He's so funny on set and it was a lot of fun."