VIDEO: Robert Pattinson and Reese Witherspoon talk marriage in Entertainment Tonight interview

Reese Witherspoon wed agent Jim Toth on March 26, but she was right back to work on Sunday, April 3 talking to ET correspondent Chris Jacobs about her marriage and new movie with Robert Pattinson.

"It's good," Reese said of the first week of her marriage. "Now I'm working. How did that happen?"

In her new movie 'Water for Elephants,' Reese plays a married star performer in a circus who catches the attention of a young animal caretaker, played by 'Twilight' star Robert and the two dished on their steamy on-screen chemistry.

Reese joked that the key for performing their love scenes was to approach the situation "slowly." The actress may have become embarrassed when Robert revealed that previous to their big screen love affair, the two played mother and son in a movie when Robert was 17 and Reese was 27.

"How 'bout that?" said Reese. "Somebody said to me, 'Was it totally weird, like, being so much older than Rob?' And I was like, 'I'm not that much older than Rob.'"

'Water For Elephants' stampedes into theaters April 22.

ET Online / via