No one couldve expected the secret thatJulianne Moorewas keeping while filmingThe Big Lebowski.

Can I tell you?

I was pregnant with my son.

THE BIG LEBOWSKI, Julianne Moore, 1998

Julianne Moore in ‘The Big Lebowski’.Gramercy Pictures/courtesy Everett

The first time I was pregnant.

I wasso sickthat day, Moore said about the scene.

Jeff is such an extraordinary person.

Drew Barrymore and Julianne Moore from The Drew Barrymore Show

Drew Barrymore and Julianne Moore on ‘The Drew Barrymore Show’.The Drew Barrymore Show/Ash Bean

He’s so funny, so generous.

I couldn’t look him in the eye without laughing, Moore admitted.

Or I’d look just beyond him or something.

That is the last outfit you want to be in pregnant and nauseous, she commented.

Moore wholeheartedly agreed, adding, Just awful.

The couple also share a daughter, Liv, born in 2002.

Watch Moore discuss being pregnant on the set of the film in the clip above.