Paper Heart follows Nick and Charlyne on a cross-country journey to document what exactly "love" is. Interviewing ministers, happily married couples, chemists, romance novelists, divorce lawyers, a group of children and more, the determined young girl attempts to find definition and perhaps even experience the mysterious emotion.

• Lo Mutuc
• Michael Cera
• Jake Johnson
• Demetri Martin
• Given Sharp
• Martin Starr
• Gill Summers
• Seth Rogen