Reese Witherspoon hits the floor!

Reese Witherspoon is no diva.

The actress who just married her Hollywood agent beau Jim Toth managed to stay calm when a storm delayed her flight to LA from San Francisco for nearly four hours.

The Oscar-winner tried to hire a limo to drive her back, said my source, but was told that some main roads had been closed.

Reese then went to grab a snack, but when she came back moments later, every seat in the crowded terminal had been taken so she ended up sitting on the floor, according to American tabloid the National Enquirer.

“Reese didn’t make a fuss or go all movie-star diva,” said a fellow passenger. “She just plunked her butt down on the floor like the rest of us.”

Witherspoon recently revealed she keeps a make-up bag wherever she goes.

“I have a bunch of different make-up bags one in my car, one in my handbag and one at home,” she said.

“I try to keep them small, but I have about five lipglosses, mascara, cover-up, lipstick and blush.”