Facebook Co-Founder Plans Unusual Wedding Sean Parker will marry Alexandra Lenas in medieval-theme party By Evann Gastaldo, Newser Staff Posted Apr 1, 2013 9:25 AM CDT 1 comment Comments Sean Parker, right, and guest arrive at the 53rd annual Grammy Awards on Sunday, Feb. 13, 2011, in Los Angeles. (AP Photo/Chris Pizzello) (Newser) – Sean Parker, the billionaire creator of Napster and co-founder of Facebook, is marrying Alexandra Lenas on June 1 in a somewhat unusual wedding: what the New York Post describes as a "medieval-themed costume party." Parker and Lenas, who have a baby daughter together, will wed in California's Big Sur forest during an entire weekend of festivities. "Guests will each get their own costumier," a source says. "There is a chance the wedding could end up looking like an episode of Game of Thrones." Parker, who was famously portrayed by Justin Timberlake in The Social Network, is apparently known for his love of costuming; in 2010, he dressed as Timberlake for Halloween, with Lenas as Britney Spears.