Ted Mosby’s son in the 2030 frame story is named Luke. Luke and his sister Penny sit with their father as he recounts the long story of how he met their mother.
The children are part of the show’s framing device: Future Ted narrates events from 2030, speaking to them from their home. For much of the series, their faces and names are deliberately withheld, allowing the audience to focus on Ted’s romantic history while preserving the mystery surrounding their mother.
Luke’s name is also a payoff to an earlier joke. Before meeting Tracy, Ted repeatedly says he would like to name a future son Luke and a daughter Leia, borrowing names associated with Star Wars. The eventual names are Luke and Penny, not Leia.
David Henrie portrays Luke in the framing scenes, while Lyndsy Fonseca plays Penny. The children are teenagers in 2030, and their reactions reveal that Ted’s supposedly romantic story is sometimes much more complicated—and less relevant to them—than he believes.