Alexa PenaVega's heart is "heavy" following the deaths of fellow child stars Hayden Panettiere, Michelle Trachtenberg and Daveigh Chase.

The Spy Kids actress, 37, has been left heart-broken following the death of Heroes star Hayden, who passed away on Sunday (08.16.26), aged 36.

Hayden's loss comes after Gossip Girl actress Michelle passed away in February, aged 39, and Lilo + Stitch star Daveigh died just two months ago, aged 35.

Alexa shared a heart-broken emoji on her Instagram, and added: "Hayden, Michelle, Daveigh... my heart is heavy today.

"These aren't just names from my childhood. They're girls I grew up alongside, sharing a world that was exciting and also incredibly hard.

"We were kids navigating something so big, and not everyone had the foundation or support they deserved."

Alexa advised her fans to "hug" their loved ones "close" following the devastating triple loss.

She added: "Today, I'm grieving and holding their families close in my prayers and thinking of everyone still fighting battles we can't see. Hug your people close today"

Wizards of Waverly Place star David Henrie also admitted he had been left devastated by the deaths.

He commented: "Very well said. I'm heartbroken and praying immensely."

Former Victorious actress Daniella Monet wrote: "I feel this deeply."

Several stars have paid tribute to Hayden following her passing last weekend.

Nashville star Connie Britton wrote on Instagram: "This was Hayden. Bursting with brilliance, shining so bright. I have no words for this sad song. Just heartbreak. I love you girl. Sleep easy now."

Fellow Nashville star Charles Esten posted on Instagram: "She was, of course, extraordinarily talented, infusing her larger-than-life character with all the heart, charisma, humor, whip-smart intelligence, and flat-out magic that were, alongside whatever troubles and pain she carried, a part of her own personal palette.

"What a great gift it was to act with her, sing with her, and to just be her friend. (sic)"

Jimmy Jean-Louis, who appeared opposite Hayden in Heroes, wrote on Instagram: "SAVE THE CHEERLEADER, SAVE THE WORLD. It was an honor to protect Claire Bennett for 4 unforgettable seasons. Goodbye Hayden #haitianhero (sic)"