Latest: Paris Hilton is struggling after a little over two days in jail, sobbing to family members over the phone and complaining she isn't sleeping or eating.

The heiress has served just over 48 hours of her 23 day sentence for violating her parole following a 2006 drink-driving arrest.

But, according to Tmz.com, the 26-year-old is close to crumbling. Sources tell the site she has no appetite and is struggling to sleep in her noisy and "freezing cell", with just three small blankets and no pillow.

Hilton's fellow inmates have extended her a warm welcome according to the sources, who claim other prisoners chanted "Paris! Paris! Paris!" as she passed them - as well as offering her gifts and words of support.