Jones hinted at recent tabloid reports that Fox and Brian Austin Green are expecting their first child while asking the Dictator star about her favourite gadget.
"Do you know the ultimate gadget that every man wants? A baby," Jones asked for ET Online.
Fox retorted: "A baby? Oh, I know where you're going with this?"
Jones then attempted to ask directly if Fox is pregnant, but the actress shot back: "You hear the grumbles… No, no."
A publicist then reportedly could be heard urging Jones to wrap up the interview, with the presenter saying: "Either way, Megan, it was a pleasure talking to you."
Jones later offered a tongue-in-cheek apology for his questioning on Entertainment Tonight.
"I'd like to formerly apologise to Ms. Fox for attacking her with the word baby. Thankfully, there was a publicist there to stop me," he said.
Fox and Green have not issued any public comment thus far on rumours that the actress is pregnant.
She can next be seen starring with Sacha Baron Cohen in The Dictator, opening on May 16 in the UK and the US.
Watch a trailer for The Dictator below: