Katherine Webb-McCarron gives birth to a baby boy with husband AJ by her side: 'Welcome to the world!'

Katherine Webb-McCarron announced the birth of her son on Wednesday afternoon.

The 31-year-old model shared a hospital room photo with her newborn where she revealed her son's name after welcoming him into the world with husband AJ McCarron by her side.

'Hey baby boy welcome to the world,' she captioned their first Instagram snap. 'Gunnar Cruz McCarron. Your brothers are so excited to meet you.'

Proud mama: Katherine Webb-McCarron shared a hospital room photo with her newborn where she revealed her son's name after welcoming him into the world with husband AJ McCarron by her side

Proud mama: Katherine Webb-McCarron shared a hospital room photo with her newborn where she revealed her son's name after welcoming him into the world with husband AJ McCarron by her side

Katherine was positively glowing as she cradled her baby boy in her arms for their first photo shared online.

She took to Instagram stories for an intimate look just hours after his birth as the family bonded in their hospital room.

While recovering in bed, little Gunnar rested across his mother's chest wearing a diaper and a white long-sleeve.

New baby alert: While recovering in bed, little Gunnar rested across his mother's chest wearing a diaper and a white long-sleeve

New baby alert: While recovering in bed, little Gunnar rested across his mother's chest wearing a diaper and a white long-sleeve

Dad: AJ, a free agent who was previously signed with the Houston Texans as their quarterback, easily scooped up his son and rocked him back and forth while mom relaxed

Dad: AJ, a free agent who was previously signed with the Houston Texans as their quarterback, easily scooped up his son and rocked him back and forth while mom relaxed

She sweetly captioned the video 'lil man' as she showed her 263,000 followers the newest addition to their family.

AJ, a free agent who was previously signed with the Houston Texans as their quarterback, easily scooped up his son and rocked him back and forth while mom relaxed.

The proud parents also have two sons back at home, Tripp, four, and Cash, two. 

Earlier this year, Katherine opened up about struggling with gaining weight early on in her pregnancy. 

Bliss: She sweetly captioned the video 'lil man' as she showed her 263,000 followers the newest addition to their family

Bliss: She sweetly captioned the video 'lil man' as she showed her 263,000 followers the newest addition to their family

Motherly glow: Pregnant Katherine Webb-McCarron, 31, took to Instagram to share photos of herself cradling her growing baby bump

Motherly glow: Pregnant Katherine Webb-McCarron, 31, took to Instagram to share photos of herself cradling her growing baby bump 

'I told my agent, what you see is what you get when I sent her these digitals yesterday. I've already gained 20 pounds in my first trimester and I have no idea why. Especially since I threw up so much from morning sickness,' she wrote. 

Expectant mothers should gain about 2 to 4 pounds during the first three months of pregnancy and 1 pound a week during the second and third trimesters, according to WebMD.

Katherine referenced the stats in her post, explaining: 'They say the normal weight to gain is 2-4 pounds so I’m way past that.'

Katherine and AJ began dating before the college football star graduated from the University of Alabama in 2012. They said 'I do' two years later in July 2014. 

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