"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.
"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."
