Jennifer Aniston's boyfriend has told her he loves her.

The 'Horrible Bosses' actress - who started dating Justin Theroux last month after first meeting him on the set of 'Wanderlust' last year - was accompanied by the actor to her official hand and footprint ceremony at Grauman's Chinese Theatre yesterday (07.07.11), where he reportedly confessed his feelings.

An onlooker told HollywoodLife.com: "Jen and Justin were cuddled up together before she was taken away for the ceremony. They were away from the cameras and they hugged and kissed for a few seconds before Justin said, 'Congratulations, I love you!'

"She didn't say I love you back but she gave him a big kiss in return and then had to hurry away."

Jennifer is likely to be thrilled by Justin's emotional honesty, as the 42-year-old star recently insisted the key to a successful relationship is being able to talk openly with your partner.

She said: "You need to talk to each other and you have to say what you want.

"You don't confront your man about things which you're not happy about, you approach it in a much more constructive way. You never want to be in an adversarial situation where it's you versus him. "All couples face those kinds of difficulties, but you've got to be able to talk about your problems and your needs and do it in a positive way. That's easier said than done, of course."