Lawrence began acting in the mid-1980s, his first role being that of Danny Carrington in Dynasty. He continued as a child actor through the early 1990s, appearing in many television and feature film roles, including the 1993 Robin Williams comedy Mrs. Doubtfire and the mid-1990s television series Superhuman Samurai Syber-Squad. In addition, he maintained starring roles in Brotherly Love, which starred his real life brothers, and Boy Meets World where he played Jack Hunter. Lawrence also appeared alongside Rob Schneider in The Hot Chick. He reprised his role as Jack Hunter in Girl Meets World.
Lawrence's singing debut was in 1986, when he and Joey performed at the 1986 Macy's Thanksgiving Day Parade. (Matt sang at the 1991 Macy's Parade as well.) Other musical Matt rarities can be found on two Gimme A Break episodes (Nell's Secret Admirer; Johnny B. Goode & The Window; Part 1; Rock & Roll Music), two Brotherly Love episodes (A Roman Holiday; Silent Night, Art Attack; Pigeon On Your Car) and his last musical moment on Boy Meets World (As Time Goes By; This Dame). Except for Silent Night and This Dame, Matt also played guitar on the remaining three.
In 2011, Lawrence guest-starred on his brother's sitcom ABC Family's Melissa & Joey.
In 2015, he reprised his role as Jack Hunter in the series Girl Meets World, a spin-off/sequel of Boy Meets World.
In 2017 Matt started a band with Joey and Andy called Still 3. They released their debut single "Lose Myself".
