Brian Austin Green and Megan Fox go for Sushi before the start of the Toronto International Film Festival, Toronto, Sept. 6, 2009. (WENN.COM)

Brian Austen Green has sparked speculation he's set to make Megan Fox a married woman after telling fans he is engaged.

The on and off couple first announced their engagement in 2006 but the Transformers beauty confirmed in June the romance was officially over.

But just three months later, the stars appeared to have revived their relationship after they were photographed kissing during an outing in Canada.

Now the former Beverly Hills, 90210 star has revealed he plans to settle down with Fox, according to a message he posted to fans on Twitter.com.

When asked by a user if he was married with kids, Green wrote, "(I'm) Engaged and have a son from my previous relationship."

Earlier this month, Fox was said to have splashed out on a mansion in Los Angeles, just weeks after Green put his Hollywood Hills pad on the market.