Sean Mendelson as a young adult. Sean Mendelson is the son of Lee Mendelson. He provided the voice of Franklin in It's Christmastime Again, Charlie Brown and in the episode "The Mayflower Voyagers" of This Is America, Charlie Brown. External links Sean Mendelson on the Internet Movie Database. Retrieved from "https://peanuts.fandom.com/wiki/Sean_Mendelson?oldid=71011" Categories: Voice actors for Franklin Community content is available under CC-BY-SA unless otherwise noted.