Donna Air and James Middleton put on a loving display as they attend glamorous charity fundraiser

They are notoriously private about their romance.

But Donna Air and James Middleton couldn’t resist putting on a loved-up display at the British Heart Foundation's Roll Out The Red Ball fundraiser on Tuesday evening.

The presenter and Kate Middleton’s brother were among the many stars who turned up to show their support at the charity fundraiser which was held at The Park Lane Hotel in London.

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Still going strong: Donna Air and James Middleton couldn’t resist putting on a loved-up display at the British Heart Foundation's Roll Out The Red Ball fundraiser on Tuesday evening

The pair cut a stylish figure at the glamorous event as Donna wowed in an exquisite blue lace gown by Nevena London.

She accessorised with orange heels and a red box clutch bag while she donned large diamond earrings.

The 35-year-old presenter wore her blonde locks in loose waves while she sported ample blusher and a pretty pink lip.