Despite Ashton and the woman in question seeming more than happy with one another, Mila shouldn't have anything to worry about, because it seems like she was just a colleague.
Ashton is spotted with a mystery woman
Ashton was snapped wearing his Chicago Bears cap, with a plaid shirt and jeans, whilst his co-worker dressed in a matching outfit of jeans, a denim shirt and brown boots. Despite being worth an estimated $140 million, Ashton definitely likes to dress down, especially for those long days in the office!
Actor wears a plaid shirt for his day in the office
The Two and a Half Men actor is now back in California after he was snapped jetting back to New York alongside his other half just last week.
The loved-up pair spent Ashton's 36th birthday together in Hollywood, with Mila allegedly renting out one of the actor's favourite restaurants, La Poubelle in Hollywood on February 8 and inviting lots of his friends to celebrate the occasion.
Who's that girl? Mila Kunis was nowhere to be seen yesterday as Ashton left his workplace with a lady friend
A source told Us Weekly magazine: ''It was very small. Ashton has been going there for years and years. It's one of his favourite spots, like home, so it was comfortable and they were well taken care of.
''They had been planning it for a while. Ashton didn't want a huge thing but they got a good group together. He's certainly changed from how he used to like to party years ago. This was more of a wholesome situation. They had a great time."
Ashton and Mila hold hands as they arrive at JFK airport, New York last week