LOS ANGELES (Variety.com) - Sunday was an emotional day for the "Fast & Furious" cast, as it marks the one-year anniversary of the death of their co-star, Paul Walker.

The actor died Nov. 30, 2013, in a car crash at the age of 40, leaving behind his teenage daughter Meadow, his parents, two sisters and two brothers. Walker's "Fast & Furious" co-stars, including Vin Diesel and Tyrese Gibson, reached out via social media to post remembrances of the late actor.

Diesel posted a photo of Walker and Diesel's six-year-old daughter.

"He was a part of so much in my life... long personal talks with my mother or babysitting the Alpha Angel... he took a certain pride in being uncle Pablo," Diesel wrote.

Diesel has previously opened up about the pain of losing his good friend. He once wrote, "I will always love you Brian" on his Facebook page, referring to Walker's character in the "Fast & Furious" franchise.

Ludacris posted a photo of Walker on Instagram, saying that he couldn't believe it had been a year since his death.

"Always in our hearts," he wrote. "Can't believe it's been a year already. You spirit will be felt in volumes across the world forever #fast7april3rd #rip"

"A celebration of Paul William Walker will be echoed around the world.... In this life one would hope to be this "effective" 1 year ago today God called an angel home early.... I miss my brother I miss my friend and I miss OUR STAR!!!!! Physically gone but forever alive in our minds, hearts and spirit," he wrote.

"What was once tears of pain and shock are now tears of JOY celebrating all that you stood for," Gibson goes on. "Everyone worldwide please take 5 mins out of your day to send live, prayers and energy to Paul's family his daughter Meadow and immediate circle today will be a tough day for us.... To this day his arm is still around my neck with love and protection..... Rest in heaven...."

Michelle Rodriguez tweeted about Walker, tagging Reach out Worldwide, the foundation that Walker founded to help those in need after disaster.

Walker died while on hiatus from shooting the seventh installment in the "Fast & Furious" franchise, "Furious 7," in what would become his final film. It's set to hit theaters April 3, 2015.