Michael Lohan traveled to Utah Thursday to visit his 21-year-old daughter, who greeted him in the parking lot of the Cirque Lodge rehabilitation center.

"The moment Lindsay saw Michael, she started running and jumped into her father's arms," says an eyewitness to the reunion. "Her father hugged her and swung her around. Lindsay was so happy. It was very emotional."

Michael, who hasn't seen Lindsay in about three years, spent several hours with his daughter, catching up and trying to heal old wounds, a source at Cirque Lodge confirmed to E! Online.