Chrissy Teigen poses nude with John LegendLos Angeles, Oct 18 (AZINS) Model Chrissy Teigen celebrated her friend Marisa Matinss birthday by posing nude with her husband and singer John Legend.

Helping Matins to celebrate her birthday on Sunday, Teigen took to Instagram to share a naked image of herself with Legend, reports aceshowbiz.com.

In the image, Teigen can be seen closing her eyes and covering her breasts with her hands while posing behind Legend, who is fully clothed and smiling at the camera as he sits on a couch.

"Happy birthday Marisa Matins," the 30-year-old wrote alongside the photograph.

Teigen married Legend in September, 2013. The couple welcomed their first child -- daughter Luna Simone Stephens -- in April earlier this year.