The reality star and boyfriend Adam Horsley welcomed "beautiful" and "perfect" Ariana Siena Horsley earlier today (February 11).
© WENN
© SWALK PR
"Ariana is beautiful & perfect. Thanku 2 every1 for all ur well wishes & support. This has been the greatest experience & day of our lives," Thomas tweeted on Monday evening.
The new arrival was born by a planned Caesarean section at 10.45am on Monday, and weighed 6lb 2oz.
A spokesman said: "Mother and baby are doing really well and are both healthy. Imogen is pleased as she wanted a daughter."
Thomas recently confessed that she wants to get her figure back "as fast as possible" and plans to "get back to work".
View all of today's best celebrity pictures - Photo gallery:
Danny Cipriani Kelly Brook spend Valentine's day together at a Casablanca screening at The Troxy in East London.
1 of 61
Copyright: WENN Gabor Scott/WENN.com
