Megan Fox confirms Shia LaBeouf 'not the father'

The response comes following growing speculation as to the identity of the father of the child. Photo / Getty Images

Megan Fox has cheekily responded to speculation surrounding the identity of the father of her third child.

The 29-year-old actress caught eyes at the CinemaCon red carpet on Tuesday flaunting an unavoidable baby bump, but later took to Instagram to rubbish floating rumours.

"#notthefather," the actress wrote alongside a collage of photos with fellow actors Transformers' Shia LaBeouf, Jake Johnson from New Girl and fellow Teenage Mutant Ninja Turtles' voice Will Arnett.

The response comes following growing speculation as to the identity of the father of the child, considering the actress filed for divorce from husband Brian Austin Green in August 2015.

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#notthefather

A post shared by Megan Fox (@meganfox) on Apr 12, 2016 at 12:47pm PDT

Despite the news of their divorce, the pair have been spotted spending time together on multiple family outings around Los Angeles, E! Online reports, which has led to speculation that the couple has put the divorce on hold.

Fans were quick to applaud the actress for her humorous response and congratulated Fox on the news of her pregnancy.

"Love your sense of humour on all the media reports. Congrats!," one fan wrote.

Fox and the Beverly Hills 90210 heartthrob married in 2010 and have two children together, three-year-old Noah and two-year-old Bodhi Green.

Fox filed for divorce from her husband Brian Austin Green in August 2015, but the pair have been seen spending time together recently. Photo / Getty Images

-AAP