United Kingdom, March 14 -- Tuppence Middleton feels "really selfish as a parent with OCD" because she struggles to cope when her daughter is ill.

The 'Downton Abbey' star has been battling obsessive-compulsive disorder - which causes uncontrollable repetitive behaviours and thoughts - for three decades, and she feels a "tremendous amount of guilt" at the measures she takes to get close to her and partner Mans Marlind's two-year-old child when offering her comfort when she's unwell, particularly because she doesn't want to pass her rituals on to the youngster.

She told MailOnline: "You feel really selfish as a parent with OCD because you want to be there and be able to cuddle them and have their face near you whenever they're ill ...

"...