Creeggan was born in Scarborough, Ontario. Along with his brother Jim, he was invited by Ed Robertson and Steven Page to play a Christmastime club show with them in Toronto, with Andy playing conga drums. The two were then invited to join the band. Only six months later, at the beginning of the summer of 1990, he joined the Canada World Youthexchange program for a trip to South America. While he was gone, the band met drummerTyler Stewart, and invited him to join the band. Creeggan returned at the beginning of 1991 to find Tyler having taken his percussion role. He switched over to keyboards and a few other occasional percussion and musical instruments. He played on two of the band's early demo tapes, Barenaked Lunch, and The Yellow Tape. He also played on the band's first two official releases, Gordon and Maybe You Should Drive. Creeggan was never completely comfortable being in the band, and wanted to continue his education in other musical areas. He recounts, "I wanted space for my music, my personality. I was always very interested in instrumental music and I wanted to take advantage of having been accepted at the Faculty of Music at McGill University in Montreal and really pursue theory and composition." According to Steven Page, "Andy had considered leaving the band as early as the rehearsals for the latter album, but was convinced to stay for the recording and tour." Creeggan departed at the conclusion of the tour. They recorded their third album, Born on a Pirate Ship as a quartet and asked Kevin Hearn to join the band for the subsequent tour in 1996.
The two Creeggan brothers also had their own writing interests and in 1994 released an album titled The Brothers Creeggan. They have since released three more albums—The Brothers Creeggan II, Trunks and Sleepyhead —and toured in support of them. Their music consists mostly of songs fusing rock and jazz. The duo have been on hiatus since 2003.
''Andiwork''
Creeggan's three solo works—Andiwork, Andiwork II, and Andiwork III—consist of more contemporary classical, with touches of jazz and rock. The albums are largely instrumental pieces.
