The former 'Late Late Show' host lived it up in a mosh at the singer's final 'Love on Tour' performance.
Corden, 44, came out to support his longtime friend at his last stop and was spotted dancing and jumping the night away in the pit at the concert.
The British comic partied with other guests in both the VIP area and the general crowd at the RCF Arena Reggio Emilia, Italy, and appeared to be having a great time as he listened and sang along to some of Styles' big hits.
Many concertgoers shared videos from the event, showing Corden getting in on the fun and living it up with everyone who came out to celebrate the memorable occasion.
The show marked Styles' last stop on his long-running Love On Tour -- which spanned seven legs across the globe over a 22-month period and consisted of 169 concerts in total.
Corden's appearance at Styles' final stop is particularly appropriate as the bestselling singer was on hand for Corden's final appearance on The Late Late Show back in April. The pop icon spoke candidly about how proud he's been to see Corden shine during his time on the show.
"Can I just say that as a friend, I'm so incredibly proud of you for everything you've done. I remember when you decided to take on doing the show and watching you do it has been incredibly inspiring to me," Styles shared. "On a personal note, you've been a safe space for me always, as a friend."
"I am selfishly very excited that you're coming home. But I'm so happy for you," he added, "And I'm really, really proud of you and I love you."