He is to play Mike Newton in the upcoming film, Twilight, to be released in November 2008.
His role model is Robin Williams.
His favourite food is cheese.
He enjoys classic rock music as the Beatles, Led Zepplin, Jimi Hendrix, AC/DC, The Rolling Stones, Black Sabbath, Metallica, Jethro Tull, Pearl Jam and Nirvana.
He is a huge fan of Edward Norton.
He claims that his best friend would describe him as "crazy, wacky, silly and fun."
He has worked with two different actors who were born on January 23, 1950: Richard Dean Anderson in the Stargate SG-1 episode "Fragile Balance" and Richard Gilliland in the Joan of Arcadia episodes "Death Be Not Whatever" and "The Devil Made Me Do It".
He was writing a one-man show in 2003 but has since moved on to other projects.
He is currently taking independent college courses.
He is a skilled drummer and plays in a band with fellow actor, Joey Zimmerman.
He is a huge fan of Family Guy.
The actresses who played his girlfriends, Mageina Tovah and Becky Wahlstrom, in Joan of Arcadia were eight and twelve years older than him respectively even though they were all supposed to be much the same age.
He played the younger version of Colonel Jack O'Neill in the Stargate SG-1 episode "Fragile Balance". His Joan of Arcadia co-star Mary Steenburgen has been mentioned numerous times on that series as O'Neill's heartthrob.
As his eyes are blue in real-life, he had to wear contact lenses when playing the younger version of Colonel Jack O'Neill in the Stargate SG-1 episode "Fragile Balance" as Richard Dean Anderson (who plays the usual version of the character) has brown eyes.
His family owns a dog named Charley. It was a runaway that they adopted after the 1994 earthquake in Northridge, California.
He got his first car, a Toyota Prius, in October 2004.
He has a nephew named Paul.
He has an older sister, Sarah, who is studying to become an optometrist.
He is 5'10".
He is a close friend of Aaron Himelstein and Christopher Marquette, both of whom he appeared with in Joan of Arcadia. He had known Himelstein since 1997 but they did not become good friends until the series began in 2003.
Michael Welch: I always thought it'd be fun to go to a sci-fi convention, watch a bunch of Klingons walking around, all of that kind of stuff."
Michael Welch: [You have to] put your own ego aside and do what's right for the role. I've always been willing to do that. I really don't care what I look like as long as it fits with the thing I'm working on.
Michael Welch: (on some of his favourite roles) I played a Buddhist monk on Chicago Hope. I was eleven at the time. They shaved my head, and I got to be a Buddhist! It was interesting! There was also CSI, which was some of the hardest acting I've ever done. It was like a three minute autopsy scene, and there's this master shot that had every actor in it. I'm dead, so I can't move or breathe for three minutes. It was so hard to do that!