Jessica Simpson welcomed her second child and first son, Ace Knute, with fiancee, Eric Johnson in Los Angeles on Sunday.
Little Ace was born via C-section to the singer, 32, and the former NFL player, 33, according to US Weekly. The baby, who has an unusual name, and mom are healthy.
"Ace Knute (pronounced Ka-nute) Johnson has arrived!" Simpson's rep told US. "Mom and baby are doing great. Jessica, Eric and Maxwell are thrilled to welcome the new addition to their family."
The couple are already parents to daughter, Maxwell, nearly 14 months. Simpson revealed her second pregnancy just seven months after Maxwell was born in November 2012.
US revealed in February that the "Fashion Star" mentor had planned to name her son, Ace, who has a middle name honoring Johnson's Swedish paternal grandfather.
She also confirmed the baby's sex with a crack, "The crazy thing is I never knew a wiener could make me nauseous," she joked about her morning sickness. "Well, I just told the world that I'm having a boy."
It was a difficult pregnancy for Simpson.
"...Like with Maxwell, I felt amazing," she said to Ellen DeGeneres in March. "Like I could do everything, eat everything. Do whatever I wanted. I had a lot of energy. This time around...I'm like exhausted. Eating Tums. That's my snack of choice."
After getting engaged in Fall 2010, the couple had to postpone their nuptials due to the consecutive pregnancies. But they are looking to tie the knot soon.
A source told US that Simpson was "telling friends that she wanted to get married a few months after the baby is born" back in April. "Jessica said, Let's have this wedding already before I get pregnant with another one!," the source said.