Adding, “If she were to get pregnant today, she’d probably just postpone the wedding until after the baby’s born.”
Orlando, 42, is already a father to Flynn Bloom, eight, with his ex-wife, Australian model, Miranda Kerr.
Miranda and her husband, Snapchat billionaire Evan Spiegel, have another son, Hart, one, and she is also currently pregnant with her third child - the couple's second.
Meanwhile, British-born Orlando stars as a detective in Carnival Row investigating a series of murders in The Burgue, a metropolis that's home to mythical creatures fleeing a war.
The cast also includes Cara Delevingne, Jared Harris, Indira Varma and Simon McBurney.
During publicity for the show, he opened up about he keeps his relationship strong with the Roar singer.
"In every important relationship, it’s always the little things you do for each other that add up," he told News.com.au.
"But things like writing a note, showing appreciation for that person and making sure they feel that you care, that you see what they’re doing, that you appreciate what they’re doing and that you try to make them feel safe and connected and grounded. That’s something that I think we both try to do for one another."