According to E! Online, Theroux's rep shared the news with People magazine over the weekend. "Justin Theroux had an amazing birthday on Friday, receiving an extraordinary gift when his girlfriend, Jennifer Aniston, accepted his proposal of marriage", the spokesperson said.
Now, we just have two questions. What's the ring like? And what will Jen wear on the big day? We're hoping her usual style staple is off the cards.
Congratulations to the happy couple! We'll keep you posted on all the wedding news (and the ring!). In the meantime, see more celebrity bling in our engagement gallery below:
Hear more about the news in the video below: