They used to but lately one or both of them have been coming out of the room to find us in the middle of the night. Mostly our three-year-old daughter... one night I woke up in the middle of the night to find that she had climbed next to me and fallen asleep!
Gonna work on keeping her in her bed all night. It's not so hard when she comes out of her room and starts talking to me, but it's a little harder when she's quiet and just sneaks into bed.
Does your LO stay in their bed all night?