Charlize Theron reportedly wants Tia Mowry banned from an exercise class.

The 'Young Adult' star was furious the 'Instant Mom' actress - who is most famous for appearing in Nickelodeon show 'Sister, Sister' in the 1990s - branded her ''mean'' in a recent interview so asked SoulCycle bosses to stop her using the facility as she was concerned about her privacy.

A source told Dish Network: ''Charlize came in so p***ed off after Tia went to the tabloids about her, and she demanded we bar Tia from ever coming back. When the manager refused, Charlize just got angrier and said she'd go to the top to make it happen.''

The source claimed Charlize said: ''This nobody who was famous for a minute 20 years ago can complain to the tabloids about me but I can't expect you to protect me from hangers-on in your studio?''

Charlize's complaint comes after Tia, 36, claimed the rolled her eyes and said ''Oh my God'' when she tried to introduce herself to the 39-year-old actress at one of the classes.

She added: ''I wasn't over-the-top. I know how to approach another celebrity. Charlize was just mean. I'm just being honest.''