Courtesy Rob Mariano
Four for four!
“We are thrilled to announce [the birth of] Adelina Rose Mariano 12:51 a.m. June 20th, 2014,” Rob, 38, wrote, sharing a photo of himself and his wife, 35, with their newborn.
“[The girls] are beyond excited to welcome their new sister,” Rob captioned a second photo of all four of his daughters.
“I’m definitely outnumbered now,” Rob, who won Survivor on his fourth try in 2011, previously told PEOPLE. “But at the end of the day, it’s exciting and fun.”
— Sarah Michaud