Vince Vaughn's relationship with Jennifer Aniston must be getting serious - he's introduced her to his mum.

The Mirror quotes a source as saying: "Vince brought Jen to meet his mother in Chicago last Friday

"It was a big deal for him as his mother's of approval means a lot to him."

Earlier, Jen flew to see Vince's Wild West Comedy Show at the Vic theatre.

Our mole says: "Jen and Vince were constantly hugging and kissing during her visit. On Wednesday and Thursday they were out for lunch and dinner and then on Friday they met with his mum for lunch.

"Vaughn is getting Jen to loosen up and let her hair down, while he's also a lot calmer around her. They balance each other out."

Source: Press Release