Australian comedy actress Rebel Wilson is 35 according to business records, ending the debate about her real age.

It follows reports by a former school mate who claimed the Pitch Perfect star was 36 and not 29 as previously cited on IMDb.

Read more: I'm a 100-year old mermaid: Rebel Wilson responds to claims she's 36, not 29

Wilson has since laughed off claims by tweetingthat she is "actually 100".

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Australian business records filed by the Australian Securities and Investments Commission (ASIC) have provided "formal verification" that the actress was born on March 2, 1980, the Sydney Morning Herald reports.

The ASIC documents further revealed "Rebel Melanie Elizabeth Wilson" was the director of Bogan Pride Productions.

It also shows the address of the comedian's previous home at Cherrybrook, Sydney's north-west, the Herald reports.

It was a former high school classmate of the Bridesmaids star who this week told Woman's Day about the beloved actress' teen years, alleging that Wilson is actually 36-years-old, not 29.

But Wilson laughed off the claims by posting a series of sarcastic tweets.

Rebel's former workmate, Fabian Cannavo, from her temporary job at the Greater Union Cinemas in Castle Hill in 2001 told news.com.au the young actress did not associate much with her workmates.

"She was kind of quiet, she didn't really hang out with anyone outside of work," Mr Cannavo said.

"She was very nice [but] I never saw her as the funny girl."

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It was business as usual for the comedy star on Monday as she filmed her new movie How To Be Single in New York with actress Dakota Johnson, despite the claims.

Read more: Actress Rebel Wilson: I wasn't allowed to lose weight

"I studied with Rebel at Tara Anglican School for Girls in North Parramatta, Sydney," the source told Woman's Day.

"But no-one knew of a Rebel Wilson. Her name is - or was - Melanie Elizabeth Bownds, and she's 36."

- Daily Mail