Copyright 2011 Valerie Macon/ Getty Images
People.com reports Gosselaar recently proposed to McGinn -- an advertising executive -- with a 5-carat diamond ring custom designed by his friend, jeweler Neil Lane. No wedding date has been set.
"He couldn't wait to propose," Lane told the magazine. "He was so excited to have found the woman of his dreams."
The former Saved by the Bell actor and current star of Franklin & Bash has two children with his previous wife, Lisa Ann Russell.