They seem exhausted after their whirlwind time at the film festival!

Kristen Stewart and girlfriend Stella Maxwell returned home from Cannes over the weekend, and the ladies were in no mood to be photographed on their way to the car. Can you blame them? They've been walking red carpets and runways nonstop for the past week!

The couple has been going strong for over a year now, and rumor has it the Twilight star is eager to make things official.

"They’ve been talking about an engagement for a while. Kristen doesn’t want this relationship going the way of her other messy romances. It’s typically impulsive on her part, but she insists Stella is the love of her life and she wants to lock her down. She may come off confident, but deep down, Kristen’s actually pretty insecure," a source dished to OK! magazine.

It feels like forever ago that Kristen was dating Robert Pattinson and Stella was canoodling with Miley Cyrus!