Mark Wahlberg Mark Wahlberg

Mark Wahlberg joined New Kids on the Block on stage in New York City this week for the first time in more than 20 years.

Introduced by fellow surprise guest 50 Cent, the Ted 2 star walked out on stage at Madison Square Garden Monday night to the strains of his 1991 hit "Good Vibrations." (His brother, Donnie, has been performing the song as part of NKOTB's set on this tour.)

Though Wahlberg didn't actually perform, he shook hands with the other band members on stage and waved to the crowd before exiting. Donnie Wahlberg captured the moment in an Instagram post:

Watch Wahlberg's entrance below: