Guillaume Lefebvre (born May 7, 1981) is a former Canadian professional ice hockey left winger who played four seasons in the National Hockey League (NHL) for the Philadelphia Flyers, Pittsburgh Penguins, and Boston Bruins.

After spending three seasons in the Quebec Major Junior Hockey League (QMJHL), Lefebvre made his professional debut with the Philadelphia Phantoms of the American Hockey League (AHL) during the 2001 AHL Playoffs.

Lefebvre captured the Phantoms' Rookie of the Year Award[1] after tallying 19 goals and adding 15 assists for 34 points in 2002.

On September 12, 2009 Lefebvre was invited to the Boston Bruins' NHL training camp, and on September 26, his work in the pre-season was rewarded with a one-year contract to play with the Bruins.

This biographical article relating to a Canadian ice hockey winger born in the 1980s is a stub.