Rashida Jones, who wrote and starred in Celeste and Jesse Forever, did an interview with JustJared.com and mentions her co-star Emma.

JJ: Who do you think is the perfect socialite if you could have your dream casting?
RJ: Dream casting and perfect socialite are kind of different for me, because I want somebody who can crush a car. Ideally, Dakota Fanning would be perfect, she’s so talented! Emma Roberts is amazing, who I just worked with. She’d be perfect too!

JJ: What was it like working with Emma [in your upcoming dramedy Celeste and Jesse Forever]?
RJ: She is a fantastic girl – a very smart, hilarious, well-read, well-rounded person. It was a joy, to work with her. She’s a little pop star with a lot of attitude.

JJ: Where and when did that film?
RJ: That filmed in L.A. from May to the beginning of July.

JJ: Any favorite memories with the cast?
RJ: There’s a scene where Emma and I are at a club and she’s dancing with her butt in my face and she couldn’t tell how close in my face her butt was. It was right in my face, and she kind of kept going after we yelled cut…I was like, “OK!”

Source: JustJared.com