Mark Owen is a few notable individuals with that name, depending on the context:

• Mark Owen (born 27 January 1972) is a British singer and songwriter best known as a member of the pop group Take That. He has pursued a solo career with several albums, including Green Man (1996) and Land of Dreams (2022). He hails from Oldham, near Manchester, England. In Take That, he contributed as a lead vocalist and songwriter during the band’s original run and continues to perform with the group after their reunion. [citation context: general biographical summaries about Mark Owen the musician]
• Mark Owen (the author) is the pseudonym used by Matt Bissonnette, a former United States Navy SEAL who wrote the memoir No Easy Day about the raid on Osama bin Laden’s compound. This Mark Owen is a different individual entirely and is associated with defense and memoir writing, not music. [citation context: No Easy Day authorship information]
• There are other media appearances and credits for a Mark Owen in acting or soundtrack work, sometimes conflated with the musician due to shared name, but the most prominent public figure with that exact name in entertainment is the Take That member and solo artist born in 1972. [citation context: filmography summaries and profiles]

If you can specify which Mark Owen you mean (the Take That member, the author, or another person with that name), I can give a more precise overview with key achievements, dates, and notable works.