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Heather Locklear Leaves Treatment Center

By Alexis Chiu

07/23/2008 at 07:25 AM EDT

After successfully completing four weeks of treatment for anxiety and depression, Heather Locklear is back home.

"Heather's feeling really great," says a close friend. "And she looks beautiful, just radiant."

While the actress's recovery is "a work in progress," Locklear seems rejuvenated by her month away, says the friend. "She told a really funny story and she laughed from her core," says the pal, who has seen Locklear since she returned home last weekend. "That's when I knew she was going to be fine. I think that's the best part of all – it's so nice to hear her laugh."

During her time at the Arizona facility, Locklear, 46, remained under doctors' care while getting therapeutic spa treatments, riding horses and spending quality time alone. Her spirits were lifted by two visits from boyfriend Jack Wagner.

Since she checked herself in on June 19, Locklear has enjoyed the support of her ex, Bon Jovi rocker Richie Sambora. Their daughter Ava, 10, spent the last few weeks with Sambora but is now with her mom. Locklear is most excited, says the source, to be "back home with Ava."

For more on Heather Locklear's return from treatment, pick up this week's issue of PEOPLE, on newsstands Friday