Ben and Jen who married in 2005, have two children – Violet, now 5, and Seraphina, 2.
Jennifer has spoken before about her joy over being a mom, telling Parents magazine in 2009 that it opened her heart.
While pregnant with Seraphina, Jennifer said she used it as an excuse to enjoy more sweets.
“It doesn’t matter if I’m pregnant or not! Jennifer spent this past weekend promoting her new film — “The Odd Life of Timothy Green,” co-starring “Warrior’s” Joel Edgerton — at Disney’s D23 Expo in Anaheim, Calif.
Jennifer Garner is pregnant with her third child.
The actress and her husband Ben Affleck - who already have two daughters, Violet, five, and two-year-old Seraphina, together - are "thrilled" about their impending arrival, according to statement released to the Associated Press.
Hollywood power couple Jennifer Garner and Ben Affleck are expecting their third child.
The couple confirmed the news that the actress is pregnant to Associated Press, today.
The happy news comes after Jennifer has lately been spotted wearing an array of baggier clothes.
News at the time.
Rumours of a possibly pregnancy first sparked when Jennifer was seen leaving a book store with Violet in late May with a noticeably fuller figure.
The usually svelte star wore jeans with another baby blue sweater and held her delightful daughter's hand as she skipped along.
Jennifer, who recently starred alongside Russell Brand in Arthur, and Ben, both 39, have been married since 2005 and celebrated their sixth wedding anniversary this June.
Jennifer recently wrapped the majority of filming for The Odd Life of Timothy Green in Atlanta, Georgia, and had her two girls on set for most of the shoot.
She's also finished shooting Butter, in which she stars alongside Olivia Wilde, Hugh Jackman, Ashley Greene and Alicia Silverstone.