‘Walking Dead’ star gives birth

The Walking Dead‘s Christian Serratos announced the birth of her baby on Instagram on Sunday, but kept the infant’s sex and name a mystery.

“Happy Mothers Day from little W and me!,” the actress wrote along the photo, which shows her clutching the dark-headed baby, and wearing two-toned glasses.

Serratos, 26, plays no-nonsense Rosita on the AMC’s zombie apocalypse series and usually shies away from talking about her personal life.

People Magazine reported in March that Serratos, whose partner is David Boyd, was expecting.