Great Britain's longest reigning monarch Queen Elizabeth II, turns 90 on 21 April but still keeps inspiring younger generations with her signature style.

She shows no sign of fatigue as she attends hundreds of engagements in a year and with her royal outfits that she likes to combine with matching hats.

Her majesty's passion to hats is so strong that over the past 50 years she has been spotted wearing about 5,000 different hats in various events.

Check the photo gallery below to see a selection of the Queen's royal hats.