Megan Fox, CinemaCon

Chris Pizzello/Invision/AP

Well, that answers that!

After E! News broke that Megan Fox was expecting her third child yesterday evening, the first question on everyone's minds was: who is the father?

And while Fox didn't exactly flat-out answer the growing speculation, she did post a collage on Instagram showing her posing with three recent male co-stars—Shia LaBeouf, Will Arnett and Jake Johnson.

The mother of two also posted the following as the caption to the photo, "#notthefather." So there you have it, you guys!

Megan Fox, Shia LaBeouf, Will Arnett, Jake Johnson

Gettyimages/ FOX

Multiple sources have confirmed to E! News that she is indeed expecting her third child with Brian Austin Green, whom she has been married to since 2010.

Fox filed for divorce in August, with the date of separation listed as June 15. Megan cited "irreconcilable differences" as the reason for the split and requested joint physical and legal custody of their two sons, Noah Green, 3, and Bodhi Green, 2.

The actors' divorce is still pending, with Fox's attorney last filing paperwork Jan. 29; no future hearings are scheduled at this time.

But an insider tells us that their divorce "will likely be put on hold for a while." The couple, who briefly called off their engagement in 2009, are now focused on Baby No. 3.

"This pregnancy was not planned, but when they found out they were extremely happy."

For more on Megan Fox's pregnancy, watch E! News tonight at 7 and 11.

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