Nikki Reed welcomes baby No. 2 with Ian Somerhalder, talks home birth

Nikki Reed and Ian Somerhalder are officially a family of four.

The "Twilight" actress shared via a heartfelt Instagram story post on Thursday that she and the "Vampire Diaries" actor recently welcomed a son, though they have yet to reveal his name.

"A few weeks ago we welcomed our son on what can only be described as one of the most beautiful days of my life," she began. "Born at home in water and surrounded by so much love, in an instant my heart doubled in size."

Editor’s Picks

Daniel Gillies, Joseph Morgan have a mini 'Vampire Diaries' reunion: See the photo

Nikki Reed, Ian Somerhalder expecting baby No. 2: 'Round 2 here we go!'

Ian Somerhalder credits wife Nikki Reed for helping him get out of debt

The couple, who married in April 2015, announced they were expecting their second child back in January. They are already parents to daughter Bodhi Soleil, whom they welcomed in July 2017.

Also in her post, Reed addressed the "strong boundaries" she has with social media -- especially when it comes to her kids -- and thanked fans for "honoring those boundaries, and for sending positivity, kindness and LOVE."

Reed also expressed gratitude to her "incredible midwife" and doctor "for helping to gently guide this sweet young boy into the world."