Morrison joined the show this season as Zoey but told Zap2It that she has no idea whether her character is the mother of Ted's children.
"I would love to be," she said. "But who knows?"
Morrison also revealed that she believes she has chemistry with Josh Radnor, who plays Ted.
"It feels like those old movies, those old comedies where they start out in conflict and suddenly it turns into love," she said. "You'll see those layers get peeled away and they end up being interested in each other."
How I Met Your Mother continues on Mondays at 8/7c on CBS.