Gwen Stefani and husband Gavin Rossdale
09/14/2014 AT 07:20 PM EDT
It was Throwback Sunday for Gwen Stefani, who posted an old photo
of herself and hubby Gavin Rossdale for their 12th wedding anniversary.
The couple has recently spent some professional time together now that Rossdale, 48, has joined her
on The Voice
this season as a mentor for Team Gwen.
Stefani, 44, is replacing Christina Aguilera, who last month had a baby girl named Summer Rain
with fiancé Matt Rutler.
and Stefani welcomed their third son together
, Apollo Bowie Flynn, in February.