Dame Helen Mirren sipped Martinis with Greta Gerwig on her birthday.
The duo took time out after a day's shooting of the Arthur remake in New York, and decided to chill out with an after-work drinking session.
"I spent my whole birthday acting with her and it was the best birthday I have ever had - I couldn't imagine a better birthday present than being out with Helen Mirren for 12 hours, it was amazing... She's such a classy, funny broad, and afterwards, she stayed and we had Martinis in the make-up trailer," Greta revealed.
The Greenberg star, who steps into Liza Minnelli's shoes as waitress Linda, couldn't help gushing over her British co-star.
"Helen is as cool as you would imagine. I can't tell if I want to become her, or if I want her to move in with me. She's the most wonderful woman and so talented, she's truly incredible," she added.
Greta also heaped high praise on Russell Brand, who plays the eponymous character.
"Russell is beautiful. He's a very sweet man with a wicked sense of humour, but there's nothing else about him that is wicked," she said. "Everything else about him is peaches and cream. He's very committed and he's working harder than anyone else. He's really focused on other people and ensuring we're getting everything we need."
His unique sense of humour has the cast and crew constantly in stitches.
Greta added: "He's so funny. He makes the whole crew laugh all the time, it's great. He genuinely cannot stop being funny if he tried."
:: Greenberg is out on DVD and Blu-ray on October 4.