The British thespian is expecting with his 39-year-old fiancée Eleanor Boorman.
"Fingers crossed everything will be fine. We’re both thrilled," the model-turned-artist told the Daily Mail.
The new baby is due in March and will be the first for Eleanor.
Charles is already a father to two grown up children, Oliver, 36 and Rebecca, 27, from his first marriage to sculptress Joanna Haythorn.
They wed in 1970 and divorced 33 years later.
Charles and Eleanor started dating in 2008, and it emerged last September that they were engaged.
The low key couple live together in a townhouse in North West London.
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