“It was really fun. This whole experience has felt like the first film, but with hindsight, which is such a special gift,” the pregnant actress, who reprises her role as Michelle, tells PEOPLE.
“This is something special and this time we get to appreciate it because we know what it means to so many people — it’s really cool.”
Hannigan, 37, and husband Alexis Denisof expect a sibling for daughter Satyana Marie, who turns 3 on Saturday, in late spring.
– Reporting by Patrick Gomez