The Welsh-born glamour model already has a two-year-old daughter with partner, Adam Horsley, and is expecting her second child in November.
Taking to Twitter to announce the pregnancy last month, Imogen shared an adorable photograph of Ariana sat on her lap holding the baby scan.
“Guess what?! I’m going to pop! This little Madam can’t wait to be a big sister in November! She’s going to be the best,” she captioned it.