United Kingdom, Feb. 27 -- Liam Payne's girlfriend Kate Cassidy is set discuss the late star's mental health struggles on a special episode of ITV's 'Lorraine'.

The 25-year-old social media star was left devastated after the One Direction star plunged to his death from a hotel balcony in Argentina in October, at the age of 31.

Kate - who claimed Liam planned to propose to her before his untimely death - is set to raise awareness by taking part in a candid chat with host Lorraine Kelly as part of her new March4March mental health campaign.

In her first TV interview since the tragedy, Kate will reportedly discuss the dark sides of fame, how she has dealt with the devastating loss, their relationship and more.

An insider told The Mirror:...