Dogstar is an American alternative rock band formed in 1994 in Los Angeles, California. The band consists of drummer Robert Mailhouse, bassist Keanu Reeves and guitarist/lead vocalist Bret Domrose (previously played bass with The Nuns), who joined in 1994 and later replacing founding member (Gregg Miller) in 1995 to become the vocalist, which he has been since 1995. They were initially active from the mid-1990s to the early 2000s, during which time the band found moderate success and garnered media attention due to Reeves' status as a Hollywood actor.

The band restarted jam sessions in 2020, and announced their reunion in 2022. Their latest album, Somewhere Between the Power Lines and Palm Trees, was released on October 6, 2023.

The genesis of Dogstar was a chance encounter between Robert Mailhouse and Keanu Reeves in a supermarket in 1991. Mailhouse was wearing a Detroit Red Wings hockey sweater, and Reeves (an avid hockey fan and a keen player of the sport) asked if Mailhouse needed a goalie. As the two men formed a friendship, they began jamming together, and were joined by Gregg Miller as the original lead guitarist and singer in 1992. Reeves said that one thing led to another in the band's history:

You know, we started in a garage, and then you end up starting to write songs, and then you're like "Let's go out and play them!", and then you're like "Let's go on tour!", and then...you're playing

— Keanu Reeves in an interview with Jimmy Fallon

The band originally called themselves Small Fecal Matter, and then BFS (Big Fucking Shit, or Big Fucking Sound), before settling on Dogstar, after Mailhouse found the name in the book Sexus, written by Henry Miller.

Dogstar was joined by Bret Domrose as an additional vocalist and guitarist in 1994. One year later, the band toured extensively throughout the U.S. and Asia, and opened for David Bowie at his 1995 Hollywood Palladium gig, where they covered a song by Pink Floyd, as well as for Bon Jovi on their 1995 These Days – Crossroads Tour in Australia and New Zealand. However, Miller left the band at the end of the tour. With Quattro Formaggi, they released their first disc, a four-track EP in 1996, via Zoo Entertainment, and followed this up with their debut album, Our Little Visionary, which was only distributed in Japan, even though Dogstar already had a worldwide fanbase at the time. The band also performed at the 1996 Zwemdokrock Festival in Lummen, Belgium, and the 1999 Glastonbury Festival in Pilton, Somerset, England.

Although the band members had other work commitments, a second album, Happy Ending, followed in 1999, produced by Michael Vail Blum and Richie Zito. Domrose called the music on this record more "pop-aggressive" than the band's earlier work. Their last performance of their initial run was in October 2002 in Japan, and the band broke up afterwards. Domrose went on to perform as a solo artist, briefly played guitar with the band Berlin and is currently writing music for film and television. Reeves and Mailhouse later performed together in a band called "becky".