Christopher Ashton Kutcher (; born February 7, 1978) is an American actor and investor. He began his acting career portraying Michael Kelso in the Fox sitcom That '70s Show (1998–2006). He made his film debut in the romantic comedy Coming Soon (1999) and became known by audiences in the comedy film Dude, Where's My Car? (2000), which was a box office hit. Kutcher appeared in romantic comedies Just Married (2003) and My Boss's Daughter (2003) and, the same year, he created, produced, and hosted Punk'd which aired on MTV for five seasons until its revival in 2012. In 2004, Kutcher starred in the lead role of the psychological film The Butterfly Effect and gained public recognition.

Kutcher subsequently appeared in more romantic comedies, including Guess Who (2005), A Lot Like Love (2005), What Happens in Vegas (2008), and No Strings Attached (2011). He starred as Walden Schmidt on the CBS sitcom Two and a Half Men (2011–2015). In 2013, Kutcher portrayed Steve Jobs in the biographical film Jobs. Since 2016, he has starred as Colt Bennett in the Netflix series The Ranch.

Beyond entertainment, Kutcher is also a venture capitalist. He is a co-founder of the venture capital firm A-Grade Investments. At SXSW on March 14, 2015, Kutcher announced Sound Ventures, the successor to A-Grade Investments managing a fund backed by institutional funding. Kutcher has also successfully invested in several high technology startups. Kutcher has investments in over 60 companies, the most prominent of which include Skype, Foursquare, Airbnb, Path and Fab.com. Kutcher has invested in five startups as of August 2017 - Neighborly, Zenreach, ResearchGate, Kopari Beauty, and Lemonade, marking his foray into the "insurtech" sector.