Kristaps Porziņģis (born 2 August 1995) is a Latvian professional basketball player for the Boston Celtics of the National Basketball Association (NBA). He is one of the tallest active players in the NBA, standing at 7 ft 2 in (2.18 m) tall, and plays both the power forward and center positions.

Born in Liepāja, Porziņģis began his professional career with Sevilla in 2012. Porziņģis quickly rose through the team's youth ranks and became the figurehead of the senior team by 2013. He subsequently won the EuroCup Basketball Rising Star award in 2015, where, at age 19, he became the youngest ever recipient of the award. The following summer, he declared for the NBA draft, where he was selected fourth overall by the New York Knicks.

In New York, Porziņģis was seen as one of the Knicks' potential cornerstones, and he was selected as an All-Star in 2018. However, disagreements with the front office led him to be traded to the Dallas Mavericks in 2019. In Dallas, Porziņģis was plagued by injuries and inconsistent play during his tenure, and he was traded to the Washington Wizards in 2022. In Washington, Porziņģis bounced back, but was traded to the Boston Celtics in 2023 as part of the Wizards' front office's desire to rebuild.