The couple decided to end their engagement in early 2013, reported E! News.
"Chad Michael Murray and Kenzie Dalton quietly parted ways earlier in the year," the actor's representative said in a statement.
"Please respect their privacy at this time."
Murray and Dalton met on the set of his hit show 'One Tree Hill' and got engaged in 2006.
Murray sparked split rumours earlier this week while he was spotted out with Australian actress Nicky Whelan.
The actor was previously married to his 'One Tree Hill' costar Sophia Bush but their marriage lasted only five months.