Bill Hader opened up about his bouts with anxiety on 'Saturday Night Live,' and how he once lost his vision from a bad migraine right before a sketch.

The Cat in the Hat star told Seth Meyers about why he declined attending the SNL milestone in his lengthy new Late Night interview.

Bill Hader was a no-show for Saturday Night Live 's 50th Anniversary special back in February, with his publicist initially stating his absence was simply due to a scheduling conflict. But there was much more behind the 47-year-old actor's reasoning for missing the special.