1 of 5 | James Van Der Beek arrives for the Primetime Emmy Awards in 2019. He took to Instagram Sunday to announce that he will not be able to attend a benefit in his honor Monday. File Photo by Christine Chew/UPI | License Photo

Sept. 22 (UPI) -- James Van Der Beek is going to miss the Dawson's Creek reunion reading at Broadway's Richard Rodgers Theatre in New York City.

The proceeds from the event will benefit F Cancer, an organization focused "on prevention, early detection, and supporting those affected by cancer." Van Der Beek, 48, has been batting colorectal cancer since 2023.

Dawson's Creek alums Katie Holmes, Michelle Williams and Joshua Jackson will read the pilot script at the event Monday. Hamilton creator and original star Lin-Manuel Miranda will fill in for Van Der Beek.

"This is the evening I'd been looking forward to most since my angel Michelle Williams said she was putting it together, way back in January," Van Der Beek wrote on Instagram Sunday evening. "So you can imagine how gutted I was when two stomach vires conspire to knock me out of commission and keep me grounded at the worst possible moment. Despite every effort, I won't get to be there. I won't get to stand on that stage and thank every soul in the theater for showing up for me, and against cancer, when I needed it most."