Cameron Diaz pretended to be Kate Upton's mother while filming The Other Woman
. The 41-year-old actress and her co-star Leslie Mann formed a very close bond with the Sports Illustrated model, who is beginning to carve out a career in Hollywood, while shooting the upcoming movie in New York City last year and she thinks the 21-year-old beauty is ''fantastic.'' The What to Expect When You're Expecting
star told E! News
: ''To work with Leslie Mann and Kate Upton, who are just two of the greatest shining bright beauties. Leslie Mann blows my mind, she is so fearless, and we didn't know Kate beforehand, but she literally just slipped right in
[under our wings]. We kept saying, 'We're your parents. We're your moms, one day we'll tell you who your dad is. We'll let you know who the donor was.' She's fantastic. And Leslie, Kate and I had a great time.''