Kristen Bell made quite a debut on Jimmy Kimmel Live! Thursday. Though she's appeared on Jimmy Kimmel's late-night show as a guest, Thursday marked her first time filling in as a guest co-host. Bell said, "I think I'll be OK, I mean, I can read words off a teleprompter, and I legitimately hate Matt Damon." Bell shared that this opportunity was super exciting for her since having two kids, she says, "I haven't been up this late since 2012."