The American actress is already mum to two-year-old Satyana with her husband, Alexis Denisof. She announced her happy news on Twitter with the message:
"Yes, I am pregnant! This time it is NOT a food baby. We are beyond happy!"
How I Met Your Mother executive producer, Craig Thomas told E! that everyone on the show is thrilled for the couple, especially as the pregnancy comes as Alyson's character, Lily is also pregnant:
"Everyone at How I Met Your Mother is thrilled for Aly! And we'd especially like to thank her for timing this perfectly to Lily's pregnancy on the show!"
Talk about timing!