"She's amazing. She wasn't bossy, no ... I mean, she's bossy, don't get me wrong, but she was never bossy with me.
"I liked working for her a lot. It's fun to get immediate feedback from your friends about your performance. It's great! It's always fun to have someone come and see what you're doing from a different view. She's a great director. I think she's gonna be fine" Greer told people.com.
Meanwhile, Holmes previously said that she found it "challenging but rewarding" stepping behind the camera for the first time.
She said: "I was actually on both sides (of the camera). It was an undertaking, but the movie was produced by Jane Rosenthal and you couldn't ask for a better producer, so I felt very taken care of.
"It was very challenging! But very, very rewarding. Hopefully you just get better every time you do it. That's what I'm hoping for." (IANS)