Camila and Livingston McConaughey
01/29/2013 at 09:00 AM EST
A lovely 80-degree day in Austin, Texas, was just what Livingston McConaughey
needed for a nice stroll in the park.
Camila and Matthew McConaughey
's newborn son enjoyed an outing with mom on Sunday – the first glimpse of the couple's third child, who was born Dec. 28.
Camila, who celebrated her 30th birthday on Jan. 28, shared her happiness via Twitter
, writing, "Today I am 30 years old, Livingston is 30 days old and I'm blessed with 3 healthy children...I am so thankful and full of joy!"
At the park on Sunday, she mostly kept Livingston covered in a light blanket, and was seen kissing the boy on the head.
Camila, meanwhile, was dressed comfortably in a white shirt, black leggings, sneakers and dark sunglasses.
Matthew was also out and about
in Austin on Sunday, looking well on his way back from his dramatic weight loss
for a movie role.