She said: "Owen is such a lovely person, and I love him dearly. And I wish him beautiful things - health and everything that he desires in life."
Kate, 28, also revealed her marriage to rocker Chris Robinson began to falter after their three-year-old son Ryder was born.
The actress, who split from Chris in 2006 after six years, admitted her divorce was the most "painful" thing she has ever gone through.
She told Vogue magazine: "We had Ryder, and we both sort of looked at each other and went, 'Something's off.'
"The divorce was the most difficult thing I've ever done in my life. The process of discovering with somebody that you love that you don't work is so painful."
Despite the heartbreaking split, Kate insists she is still close to her ex-husband and claims being a single mother has forced her to grow up quickly.