Teigen posted the clip on her Instagram stories and captioned it, "Hahahahaha might as well tell you."

Teigen and Legend already have a 4-year-old daughter and 2-year-old son.

They revealed they were expecting another child in Legend's "Wild" music video in August, when she was seen holding her baby bump at the end.

She previously went through IVF for her two children but explained that this third pregnancy happened naturally and unexpectedly.