Brian Austin Green's former partner has seemingly spoken out in support of Megan Fox.

Brian Austin Green

Brian Austin Green

The former 'Beverly Hills 90210' star was blasted by his estranged wife over the weekend for sharing photos of their sons Noah, seven, Bodhi, six, and three-year-old Journey on social media and now Vanessa Marcil - who has 18-year-old son Kassius with the actor - has shared a cryptic post apparently in response to the online row.

Along with the hashtag #ImWithYouSister, Vanessa wrote on Instagram: "Like I said... the truth always comes out in the end...(sic)"

Megan had blasted Brian for trying to make her look like an "absent mother" and presenting himself as "the perennial, eternally dedicated dad of the year" on his Instagram account.

After Brian shared a photo of himself and Journey in their Halloween costumes, Megan wrote: "Why does Journey have to be in this picture? It's not hard to crop them out. Or choose photos that they aren't in.

"I had a great halloween with them yesterday, and yet notice how absent they are from my social media. I know you love your kids. But I don't know why you can't stop using them to posture via Instagram.

"You're so intoxicated with feeding the pervasive narrative that I'm an absent mother, and you are the perennial, eternally dedicated dad of the year. You have them half of the time.

"Congratulations you truly are a remarkable human! Why do you need the internet to echo back to you what should be inexhaustibly evident in the way your children love you? (sic)"

Not long after the 34-year-old beauty shared her comment, Brian - who announced in May this year that he and Megan had split - took down his original post.

He then shared the same photo, but with Journey cropped out and wrote on the new post: "Hope you all had a happy Halloween!!!"