Black followed that up with his own post sharing another photo along with the caption, "A very happy #ValentinesDay from ours to yours".
'Lance and I definitely want a family in the future - who knows when?' Tom told MailOnline previous year. "So happy for you!"
A third added: "Amazing news congratulations to you both!"
Black, 43, and Daley, 23, Wednesday in a fairytale ceremony last May in Devon, England, with a castle as a backdrop. "I always knew it was going to happen at some point".More news: Love blooms and roses rule for Midstate florists at Valentine's Day
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Since tying the knot, Black has moved to London to live full time with his husband, who now own a home together.
"We shared the day with 120 of our closest friends and family, from Texarkana to Plymouth!"
Dustin won the Academy Award for Best Original Screenplay in 2009 for the movie Milk, based on the life of gay rights activist Harvey Milk. "I don't know how many [we want to have] - an army of kids, a whole diving team".
Meanwhile, Dustin said in an interview with Gay Times a year ago that he's still learning new things about his husband every day.
Sources previously told Us Weekly that Daley wasn't bothered by the 20-year age gap between him and the American writer.