The former first lady joined Santa Claus at the hospital on Thursday and read Twas The Night Before Christmas to children. Obama also shared words of encouragement and took questions from the kids, who apparently had no idea she was going to visit, FOX31 reported.
In a video published by the Associated Press, Obama can be seen dancing with one child before encouraging Santa Claus to join in.
Children’s Hospital Colorado celebrated Obama’s visit on Twitter.
“Our patients were thrilled to receive a surprise visit from former first lady Michelle Obama!” the tweet read.
On Friday, Witherspoon shared on Instagram that it was an “honor” to interview Obama.
“This was a night I will TRULY never forget,” she wrote in the post’s caption.