Avril Lavigne, Ex-Husband Deryck Whibley Reunite

Credit: Roshan Perera/Splash News Online

Friendly exes! 

Avril Lavigne and Deryck Whibley's divorced in November 2010, but it looks like the former punk rock couple are still pals. The 27-year-old singer was all smiles as she met up with her ex-hubby Thursday for dinner in West Hollywood.

On Thursday, Lavigne, who is currently dating Brody Jenner, tweeted her support for her ex's band. "Congratulations Sum 41 for your Grammy nomination!" she wrote. "So f**king cool. You guys deserve it."

Since the end of their three year marriage, Lavigne and Whibley have remained close. "He's one of my best friends, and we work really well together and we stay in touch," Lavigne told Ryan Seacrest on his KIIS FM radio show last year. "I think we're very lucky. We've been friends for a really long time and we always will be family. We have a connection. Things are good. I'm really grateful for that."