Lottie dotes on her younger brother

Louis Tomlinson‘s younger sister Lottie loves hanging out with their baby brother Ernest.

Lottie, who’s celebrating her 16th birthday today, shared two super-sweet Instagram snaps of six-month-old Ernest at the weekend.

In the first shot, Lottie cuddles the cute youngster – who’s known as Ernie and has a twin sister named Doris – while he gazes contently into the camera.

The other photo sees Ernest showing off his huge blue eyes as he stares straight into the lens.

The twins’ parents are Louis and Lottie’s mum Johannah and their stepfather Dan Deakin, who got married in Pontefract, West Yorkshire on 20 July.

Johannah and Dan took the little ones on honeymoon with them to Marrakech, Morocco before returning home to Lottie and her three other sisters last week.

Louis, 22, is currently on the North American leg of One Direction‘s Where We Are tour.

Fans thought Lottie’s pictures of Ernest were absolutely adorable.

‘aw omg these eyes!!’ wrote one.

Another commented: ‘*-*♥these babies r the cutest things in the world.’

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Anna Duff