Rebel Wilson is in a relationship with millionaire Jacob Busch

Rebel Wilson and her new boyfriend are red carpet official.

Wilson, 40, proudly showed off her new fella Jacob Busch, 29, at Prince Albert's Planetary Health Gala in Monaco.

Rebel Wilson and Jacob Busch attend the Monte-Carlo Gala For Planetary Health. Photo / Getty Images

The two were introduced last year but only started dating when Wilson returned to the US after quarantining in Australia during the Covid-19 pandemic.

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"They are officially boyfriend and girlfriend," a source told People magazine. "He's a gentleman, has very old school manners and treats her well.

"He is also very health conscious and they've been motivating each other with their health journeys."

Wilson also made their relationship Instagram official this morning when she posted a photo standing alongside Busch and fellow actors Helen Mirren and Kate Beckinsale in Monaco.

Who is Jacob Busch?

The handsome fella is a member of Anheuser-Busch brewing dynasty and is rumoured to be worth more than $150 million.

Anheuser-Busch manufactures beer brands including Budweiser and Rolling Rock.

Adrienne Maloof and Jacob Busch in 2017. Photo / Getty Images

Busch was previously in a relationship with former Real Housewives of Beverly Hills star Adrienne Maloof who is more than 25 years older than him.

View this post on Instagram

Reflection Monday. Start working on your spring body now. Before you know it, summer will be here🌞💪🏼 #selflove #selfcare #1

A post shared by Jacob Busch (@jacobpbusch) on Mar 2, 2020 at 10:25am PST

Rebel's makeover

2020 has been a year of change for Wilson with the Pitch Perfect star dubbing it her "year of health".

The Aussie star has slimmed down thanks to a gruelling exercise regime and has kept fans up to date with her fitness journey on social media.

View this post on Instagram

Raising money for a good cause today @schoolofstjude with the help of two hot Jacobs @jacobandreou & @jacobpbusch x Hair & photo: @robertvetica Make-Up: @makeupmatthew Styling: @elizabethstewart1 Dress: @alexevenings

A post shared by Rebel Wilson (@rebelwilson) on Aug 26, 2020 at 5:04pm PDT

"I'll be honest with you guys – with my 'Year of Health' mission I'm trying to get to 75kgs and career wise am trying to get one of my movies into production before the end of the year," Wilson wrote in a since-deleted Instagram post from May. "Both of these things are requiring a daily effort and there's constant set backs – but I'm working hard."