Hayden Panettiere spotted without engagement ring

New York: Actress Hayden Panettiere, who was in rehab to seek treatment for postpartum depression, was spotted without her engagement ring here. The actress looked healthy as she sported a plaid shirt and blue pants while reading the book "Underboss: Sammy The Bull Gravano's Story of Life in the Mafia" and smoking a cigarette.  However, she wasn't wearing her engagement ring during the outing, reports aceshowbiz.com.  The "Nashville" star got the six-carat ring from her fiance Wladimir Klitschko, whom she has been dating on and off since 2009. There's still no official word from the couple, who are parents to 18-month-old Kaya Evdokia.  Panettiere was first treated for postpartum depression last year, months after giving birth to her daughter in December 2014. She decided to seek holistic help for her continued struggles with the condition two months ago.  Back in May, she announced on Twitter: "The postpartum depression I have been experiencing has impacted every aspect of my life. Rather than stay stuck due to unhealthy coping mechanisms I have chosen to take time to reflect holistically on my health and life. Wish me luck!"