Conversation so far:
What happened in 1997 with Will Forte?
He began taking classes at the Groundlings in Los Angeles, an improvisational and sketch comedy troupe and school, while tutoring children to make ends meet.
What did Will Forte do after taking classes at the Groundlings in Los Angeles?
Will Forte landed his first professional job writing for The Jenny McCarthy Show, a short-lived variety show starring Jenny McCarthy.
Did Will Forte do well in his job writing for The Jenny McCarthy Show?
He was asked to submit a packet to the Late Show with David Letterman and was told Letterman responded favorably to animation.
Did Will Forte join the Late Show with David Letterman?
Yes. After only nine months at Letterman, he was let go from the job.

Question: what other characteres?
Self-contained rewrite: What other characters did Will Forte play around 1997?