Jessica Chastain has joked Matthew McConaughey flirted with her grandmother more than she's "ever seen before".
The 37-year-old actress was shocked to find the 47-year-old actor laughing and joking with her relative at a screening of their new movie Interstellar when her gran got so "star-struck" by Matthew and frantically started taking pictures of the hunky Academy Award-winner.
Speaking on an episode of Conan, which airs tonight, she said: "He flirted with her like I have never seen! They met at a screening of Interstellar and my grandmother was so star-struck, and she kept saying, "I want a selfie Matthew!"
"She then proceeded to do a photoshoot in front of everyone, she was like, 'You stand there,' and she just started taking pictures of Matthew.
"But then I took a picture of the two of them, and my God ... I don't think she even realised I was taking the picture."
