Ethan Gregory Peck was born on March 2, 1986, in Los Angeles, California. He comes from a distinguished Hollywood lineage as the grandson of legendary actor Gregory Peck and his first wife, Greta Kukkonen. His father, Stephen Peck, is a former actor, documentary filmmaker, and Vietnam War veteran who later became the president and CEO of U.S. Veterans Initiative. His mother, Francine Matarazzo, is an abstract artist.

     Peck grew up in Los Angeles, attending private schools such as Campbell Hall and Harvard-Westlake. He excelled in athletics, playing varsity lacrosse, football, and track, and also studied classical cello for six years.

     After high school, Peck attended the Tisch School of the Arts at New York University, where he trained in the Experimental Theater Wing for three years before leaving to pursue acting full-time. 

     Peck began acting at a young age, making his film debut at age nine in the TV movie Marshal Law, where he played the son of Jimmy Smits' character. He later appeared in the 1999 movie Passport to Paris starring Mary-Kate and Ashley Olsen, marking his first on-screen kiss with Mary-Kate Olsen.

     Peck gained recognition for his role as Michael Kelso (young version) in That '70s Show and later starred in the ABC Family series 10 Things I Hate About You (2009–2010), based on the popular 1999 film. He has appeared in several films, including: Tennessee (2008), Adopt a Sailor (2008), which earned him the Best Actor award at the Sonoma International Film Festival

     Peck’s most notable role came in 2019, when he was cast as Spock in Star Trek: Discovery (Season 2). His portrayal of the iconic character, originally played by Leonard Nimoy, was widely praised. He later reprised the role in the spin-off series Star Trek: Strange New Worlds.

     In 2015, Peck became a brand ambassador for Salvatore Ferragamo, appearing in print editorials and a short film celebrating the brand’s 100th anniversary.

     Peck holds a brown belt and has achieved the first level of black belt in Shotokan traditional karate, training under kumite world champion Avi Rokah. He has also expressed a deep appreciation for classical music, having studied cello for several years.