United Kingdom, July 13 -- Hayden Panettiere and Tori Spelling both pulled out of a horror convention at the weekend due to "emergencies".

The two actresses were both due to appear at the Creep I.E. Aftermath event in California on 11 and 12 July, but had to withdraw for undisclosed reasons.

Creep I.E. Con first announced Heroes and Scream 4 star Hayden would no longer appear.

They wrote on Instagram: "Hayden Panettiere has an emergency and will not be able to attend this weekend. We are looking forward to her appearing at an upcoming show."

A spokesperson for the 36-year-old star then told People magazine she had withdrawn from the event "due to a private family matter concerning the health of an elderly relative."

She was later rep...