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Gwen Stefani posted an old photo of her and her husband, Gavin Rossdale, in honor of their 12th wedding anniversary Sunday.

The couple, who welcomed their third son, Apollo Bowie Flynn, in February, first tied the knot in Rossdale's native England Sept. 14, 2002. Two weeks later, they held a second wedding in Los Angeles.

In addition to raising their three boys together, the pair is collaborating professionally.

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Rossdale, 48, the lead singer of Bush, just joined "The Voice" this season as a mentor for Team Gwen.

Stefani, 44, is replacing Christina Aguilera, who had a baby girl, Summer Rain, with fiancé Matt Rutler last month.