Scarlett Johansson is moving in with Ryan Reynolds

Scarlett Johansson is moving in with boyfriend Ryan Reynolds - and her mum is allegedly not happy about it.

The Hollywood star has been dating Reynolds for more than a year and recently moved her belongings into his Los Angeles home, the New York Daily News reports.

But Scarlett's mum, Melanie Sloan, is still not comfortable with the age difference between Scarlett, 23, and Reynolds, 31, the paper claims.

"Rumour has it that Scarlett Johansson is moving in with beau Ryan Reynolds, much to the ire of her mom," the Rush & Molloy column states.

"We hear the buxom blond shlepped her stuff into Reynolds' L.A pad, but Mama Johansson thinks that at just 23, her baby girl is too young to cohabitate with the 31-year-old Reynolds."

Representatives for Johansson did not return calls.