Caitlin Clark’s final game at Carver-Hawkeye Arena last March was a must-watch event that drew celebrities from all over.

The same can be said for Clark’s jersey retirement on Sunday.

Prior to tipoff at Carver-Hawkeye Arena for Iowa women’s basketball’s Big Ten showdown vs. No. 4 USC, comedian and former late-night talk show host David Letterman made his way into the arena to watch the Hawkeyes and Clark’s jersey retirement.

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Clark, the all-time leading scorer in NCAA college basketball history, men’s or women’s, is just the third Hawkeye to have her jersey retired, joining Megan Gustafson and Michelle Edwards to have received the honor.

Behind 28 points from Villanova transfer Lucy Olsen, Letterman watched the Hawkeyes give the fourth-ranked Trojans just their second loss of the season while sitting courtside next to former Iowa coach Lisa Bluder.

Here’s what you need to know on why Letterman was in attendance at Carver-Hawkeye Arena on Sunday:

Why was David Letterman at Iowa women’s basketball game vs USC?

It’s simpler than one might think: He’s a native of Indianapolis and a fan of the Fever, whom Clark plays for, so he wanted to show his support for her on Sunday.

As noted by Hawk Central, part of the USA TODAY Network, Letterman hosted the WNBA Rookie of the Year at Ball State in December for his Distinguished Professional Lecture and Workshop Series.

All told, Letterman is a fan of women’s basketball:

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Where did David Letterman go to college?

Letterman graduated from Ball State in 1969. As noted by Ball State’s website, the university named the building for its College of Communication, Information, and Media the David Letterman Communication and Media Building in 2007.

Where is David Letterman from?

The former late night show host is a native of Indianapolis.