Mumbai, Mar 20 (PTI): Teaming up with ex-boyfriend Ranbir Kapoor after a gap of almost five years for Karan Johar's upcoming film 'Yeh Jawaani Hai Deewani', actress Deepika Padukone says the 'Barfi!' star is still "possessive" about her.

"Ranbir is still possessive about me. He doesn't like me talking about others," Deepika told reporters here at the first look launch of their film 'Yeh Jawaani Hai Deewani'.
The pair last worked together in 2008 in 'Bachna Ae Haseeno'.

"We did all the permutation... chemical combination was tested before we agreed to do the film (sic)," she said.

'Yeh Jawaani Hai Deewani' is an upcoming romantic film directed by Ayan Mukerji under Johar's Dharma Productions.

Heaping praises on Ranbir, Deepika said he was a natural actor. "I have observed that he (Ranbir) never prepares for any scene how much difficult it may be. He never takes stress or gets worried," she added.

Deepika said that Ranbir has emerged as a "big star", lapping up awards for his performance. "He is an amazing person to work with. It feels great about his growth... I feel proud," she said.