
The former Towie star, 28, broke the news today on her birthday by sharing a picture of her baby bump as she opened a baby grow.
She wrote alongside it: “Best birthday present I’ve ever had. love you @ryanthomas84.”
The exciting news come just two months after the ex Corrie star, 35, popped the question to her during a holiday in Italy after two years of dating.
Ryan is already dad to Scarlett, ten, from his previous relationship with Tina O’Brien.
Just last month, Lucy admitted that Ryan wasn’t initially sure about having more children, but had agreed to in a “few years”.
She told OK! Magazine: “At the start of our relationship, Ryan told me that he couldn’t see himself having any more children.
“It wasn’t something I pushed at the time because I wasn’t ready to have kids and I assumed that he would change his mind one day.
“It’s something we’ve since had to have an adult conversation about and we’ve agreed we will try for children when the time is right.”
Ryan added: “I definitely want children with Lucy but I don’t think it’ll happen for a few years.”
Meanwhile, the couple were inundated with congratulations from their friends and fans – including Lucy’s best friend Lydia Bright who also recently announced she was expecting.
She wrote: “Wohooooooooo, we can finally scream it from the roof tops. Can’t wait for our babies to be best friends .”
Corrie star Brooke, who is also pregnant, wrote: “So exciting.”
While Catherine Tyldesly commented: “Oh my GOD!!!!! Congratulations guys!!!!! Amazing.”
The news come as Lucy revealed that the pair are yet to set a date for their wedding and don’t plan to live together once they finally say I Do.
Ryan still has a home in Manchester so he can be close to daughter Scarlett – and his family and friends all live there.
TOWIE favourite turned fashion label and fitness firm boss Lucy has a place near London.
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They will maintain their separate bases even after they have married, with Lucy revealing in a Q&A on her Instagram story: “We will always have 2 homes north and south.
It works well for us right now and we don’t see it changing anytime soon.”
She added that the pair are still to set a date for the nuptials but revealed that the wedding will be big, saying: “Ryan as a very large circle of friends.”
The star revealed: “We have been super busy and are still in the engagement bubble! But I can’t wait to start planning.”
The pair – who met on Beat Gryll’s Celebrity Island – did however throw a huge engagement party aboard a boat on the Thames, complete with first dance, cake and speeches.
Inside Ryan Thomas and Lucy Mecklenburgh’s romantic Italian engagement
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