It's November 30 in the northern hemisphere today and it marks an especially hard day for everyone who loved Paul Walker.

The actor was killed in a car crash three years ago today and those who knew him best have taken to social media to pay tribute to the late star.

Paul Walker and Vin Diesel attend the world premiere of 'Fast And Furious 6.' Photo / Getty
Paul Walker and Vin Diesel attend the world premiere of 'Fast And Furious 6.' Photo / Getty

The cast of the

Fast & Furious

franchise were devastated by his passing and to keep his memory alive Ludacris, Vin Diesel, Jordana Brewster and Tyrese have taken to social media to honour their friend.

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Diesel took Instagram to raise awareness for Paul's charity, Reach Out Worldwide.

Today and every day, you're Always in our Hearts. #paulwalker #alwaysinourhearts #goodwill #dogood #legacy #HEROWW

A post shared by Reach Out Worldwide (@reachoutww) on

Tyrese posted a touching Instagram video montage of his favorite moments with Walker.

He captioned it: "This week is always rough for those of us who really knew him personally. 14 years of laughter, hugs and love, literally one of the nicest people on human feet! Nov 30th we lost an angel! Paul treated everyone with the upmost (sic) respect and went out of his way to make everyone feel like they mattered... I love and I miss you dearly."

The video featured snippets of their work together on Fast & Furious.

Ludacris commemorated his friend with a photo of Walker on the movie set, saying, "Gone but never forgotten. #love"

Gone but never forgotten. #love

A post shared by @ludacris on

Brewster, who played Walker's love interest in the franchise, also shared a loving photo of Walker and herself.

"Love you forever, miss you forever," wrote the actress.

Love you forever, miss you forever

A post shared by jordanabrewster (@jordanabrewster) on