United Kingdom, Aug. 18 -- 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 (16.08.26), 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...