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Karoline is the commissioning editor for Channel 5, and first met Jimmy at an audition. He later asked her out at a gig.
The pair - who have been dating since 2001 - have not spoken publicly about whether they would have children together.
MailOnline have contacted Jimmy's representatives for comment.
Out and about: The couple - who have been dating for 20 years - looked in good spirits as they enjoyed the sunshine together
No details: Jimmy, 47, and Karoline, 46, have been pictured with a pram on several occasions since January 2020. No further details are known
Meanwhile, Jimmy recently revealed the full extent of his makeover after dazzling fans with his new look.