In a separate set of tweets on Saturday night Alice also wrote that several of her friends had met Bianca and that they had been aware of their romance.
She said: “I have just found out that all his friends and family were in on it and had met her etc. Gobsmacked again, And nobody thought it would be a good idea for him to let us know?
“I think they came out to our friends as a couple probably two years ago, nice.”
Ioan and Alice first met in 2000 while co-starring in 102 Dalmatians, and are parents to two little girls, Ella Betsi, born in 2009, and Elsie Marigold, who arrived in 2013.