"This has been a lifelong dream of mine and I am beyond excited for this journey," Ivey posted on social media.
Ivey averaged 17.3 points, 4.9 rebounds and 3.1 assists and was named to The Associated Press All-America second team. He joined Duke's Paolo Banchero as the only players this season with 600 points, 175 rebounds, 100 assists, 30 steals and 20 blocked shots. Ivey is the fourth Big Ten player in 30 years to achieve those marks.
"What a ride this has been," Williams wrote. "Four years ago, when I started this journey at Purdue, there was no way to envision what my time here would become. It has been filled with many more highs than lows, and I wouldn't trade one second of this journey for anything. My brothers and I have accomplished a lot, and I hope that we leave this program in better shape than when we arrived."
Williams is listed as a mid-second-round pick in ESPN's latest mock draft.
Ivey played his best against ranked opponents, averaging 19.1 points, 5.1 rebounds and 4.4 assists in nine games. He scored in double figures in 33 of his 36 games and had a team-best 14 games of at least 20 points.
He had a combined 40 points and shot 5-for-10 on 3-pointers in the Boilermakers' first two NCAA tournament games. He struggled in the regional semifinal loss to Saint Peter's, with nine points and six turnovers.
The 6-foot-10, 250-pound Williams was part of an imposing post combination with 7-foot-4 Zach Edey, coming off the bench in all but four games this season and averaging 12 points, 7.4 rebounds and three assists. Williams is the only player in Purdue history to score at least 1,400 points with 900 rebounds and 200 assists.
Ivey and Williams are the third and fourth Purdue players in recent years to declare for the draft as an underclassman. Caleb Swanigan did it in 2017 and Carsen Edwards in 2019.
Information from The Associated Press was used in this report.