Amid rumours of a split, Ben Affleck and Jennifer Garner will soon be welcoming a second child, according to actor Victor Garber.

Earlier this month, reports surfaced the actress was pregnant, but Affleck's spokesperson refused to confirm or deny the reports.

But now Garner's former Alias co-star Garber, who officiated the couple's 2005 wedding, has confirmed the news, insisting, "Yes, she is".

And a source tells Usmagazine that Garner is already five months into her pregnancy.

The insider adds: "She and Ben are still deciding whether they'll ask the sex of the child."

The pair welcomed daughter Violet in December 2005.

See pictures of Jennifer's bump here.