Heidi KlumHeidi Klum is rumoured to be pregnant with her fourth child.

Rumours began to swirl that the supermodel is expecting again after sketches of her wearing customised maternity gowns appeared on her Project Runway website.

A source explained: “Sketches leaked online of her in redesigned couture gowns to make room for a bump, but were quickly taken down.

“Heidi’s people have dismissed the rumours, saying the drawings were ‘what ifs’ but those close to her know they’re true.”

Heidi already has three children, daughter Leni and sons Henry & Johan, but the source added that she and husband Seal are delighted about the new news: “They both love kids and want a large family. Heidi loves being pregnant and each child brings more joy to an already happy household.”