Mike O'Donnell (born 10th March 1952) is an English composer, songwriter and musician. He was the co-music composer for Thomas the Tank Engine & Friends with Junior Campbell, from its debut in 1984 until 2003. He was also the music composer for TUGS.
Set during Deathly Hallows, the story of how Ginny, Luna and Neville protected the students at Hogwarts during the year the school was controlled by Voldemort's sadistic Death Eaters, and reconstituted Dumbledore's Army as an underground resistance.