Hilary Duff may be a crazy fan when she’s cheering for her hockey-player fiancé Mike Comrie. But when it comes to wedding planning, the actress is a lot more calm.

“She’s really relaxed and wants something comfortable and great,” big sister Haylie Duff said Monday at the Tribeca Film Festival premiere of the documentary Earth Made of Glass. “She’s just so excited to be engaged.”

Comrie, 29, who plays for the Edmonton Oilers, proposed to Hilary, 22, over Christmas in Hawaii. Four months later, she and her sister are still in the early stages of planning the nuptials.

“We’ve started talking about the wedding stuff, but she’s still just really happy in this sort of phase,” says Haylie, 25. “It’ll be a while, but it’s fun to talk about it and think about it.”

Luckily, Haylie hasn’t to deal with any bridezilla-like antics from her little sister. “She’s just not the [type],” she says. “One of my other best friends got married and was a complete bridezilla, so I’m not getting the signs from Hilary that that’s the case.”