"I am so lucky," Witherspoon said of her love scenes with Pattinson.
"He's so amazing and wonderful and sweet and just the nicest guy too, so you can just add that to the soup. I mean, he's just so good looking and he's a really nice person."
Pattinson previously played Witherspoon's son in Mira Nair's 2004 film "Vanity Fair".
The actress also revealed that both of them share a more humorous than amorous relationship off screen, reports people.com.
"We'll probably just laugh the whole time because all we do is just laugh and joke around," she said.
In "Water For Elephants", Witherspoon, 34, and Pattinson, 24, play lovers involved in a triangle that develops between their characters and Witherspoon's on screen husband.
