Duchess of Sussex with Prince Harry. (Pic: Instagram)

Thomas Markle thinks his daughter Meghan, Duchess of Sussex, and her husband Prince Harry will start a family soon.

The 73-year-old retired lighting director revealed his daughter Meghan has wanted a baby of her own for a "long time" so is expecting her and Prince Harry to start a family in the near future.

He said: "She's wanted children for a long time.

"When she met Harry and she spoke about how much she loves him... there's got to be a child in the making there soon.

"I couldn't be more proud of those two, I think they'll do a fabulous job. They're great and I love then dearly. I'm very happy to have a new son-in-law."

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Thomas was unable to attend the couple's wedding last month because he was recovering from heart surgery but he's looking forward to finally meeting 33-year-old Harry on a visit to London "soon".

He said: "I look forward to coming to London to meet them soon. I'd love to. I'm on the mend and feeling much better and doctors are making me lose weight and take better care of myself. I'll be ready to go."