Deryck Whibley of Sum 41
Deryck Whibley, pictured here performing with his band Sum 41 at the 2015 Alternative Press Music Awards on July 22, 2015, in Cleveland, Ohio, married Ariana Cooper on Sunday. Getty

It's been a long year for Sum 41 singer and guitarist Deryck Whibley. After a near death experience in 2014 while battling alcoholism, the 35-year-old married girlfriend Ariana Cooper, who stood by him during some of the toughest days of his life.

Whibley married Cooper in Los Angeles at the Hotel Bel Air on Sunday, according to People. A source told the news outlet that it was a very "chill and intimate" ceremony.

"They had a violin play at the ceremony and the music was mellow, not typical rock that Deryck's band plays, which was surprising," the source dished. Whibley was once married to singer Avril Lavigne, but the two divorced in 2009 after three years of marriage.

Wedding photographers Duke Photography shared some photos from the wedding on Twitter and Instagram Monday afternoon. The photos showed Whibley and Cooper walking hand in hand, as well as several shots of Cooper in her dress.

The tweets from the wedding can be seen below.

Doctors admitted Whibley to a hospital in Los Angeles in April 2014, after he collapsed in his home. Further examination revealed that the singer was suffering severe liver and kidney damage. He was forced to spend a week in an intensive care unit medically sedated after his liver and kidneys collapsed. He was released from the hospital at the end of May 2014.

Since then, the "Fat Lip" singer has been working as hard as he can to get back to touring with Sum 41 and is working on a new record with the band. In April, Whibley told Vice magazine’s music channel Noisey that drinking is the last thing he’s thinking about. The musician says he’s “not missing anything” and assured readers he will be sober throughout the band’s future tours.

"I think it was the right time in my life for it to happen. I’m glad it happened now and not when I’m like, 50, because my body wouldn’t have been able to handle it. But it's unfortunate that it had to even come to that," Whibley dished.

In July at the Alternative Press Music Awards, guitarist Dave “Brownsound” Baksh returned to Sum 41 for the first time since 2006 and is a regular member of the band again. On August 15, Baksh thanked everyone who welcomed him back to the band on Twitter.

In an interview with Alternative Press in August, Baksh discussed what it was like to once again play with Sum 41 and be a part of the band again.

"Deryck [Whibley] and I chatted, and we’re going to basically start working on the new record, and if there’s anything I can do for it, I’m there for him. And then we start the touring cycle. Yeah, I am back—and I will do everything I can to stay permanent. I won’t get kicked out,” Baksh dished.

The band is working on its sixth studio album, though it remains unclear when that will be released.