(Courtesy)

Meghan Markle looks happier than ever as a new mum, and she has been glowing at every single engagement she's attended since welcoming little Archie.

She's broken her maternity leave several times by surprising fans at a number of events including Wimbledon and the Lion King Premier.

And she's been favouring one particular hairstyle - a sleek bun - which is a change from her trademark messy bun.

She's worn her hair in the style four times since becoming a mum back in May, including Trooping the Colour and Archie's christening.

According to celebrity hair stylist James Johnson this is probably a very clever trick to protect her post-birth hair.

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It's a sophisticated look (Image: Ian Vogler / Daily Mirror)

He told Mail Online: "When you're pregnant your hair cycle stops so you don't shed any hair, so when you give birth, all the hair you should have lost in the nine months falls out over a quick period.

"Meghan may have opted for a scraped back bun to prevent her hair from further damage. If her hair was damaged during pregnancy, putting her hair up will prevent it from further damage.

"Also she was previously criticised for her 'messy bun' so maybe she's trying to go for a more polished look to silence the haters."

He also points out that it's a quick hairstyle, perfect for a new mum as Meghan reportedly does her own hair, and it's good in the hot weather we've had recently.

She wore her hair in a ponytail at Wimbledon, but it was still a tight and sleek up do (Image: PA)

Meghan looked stunning at her most recent appearance when she joined a whole host of celebrity stars on red carpet for the European premier of the Lion King.

During the event Meghan and her husband Prince Harry met Beyonce and Jay Z - and it almost too much for fans to deal with.

The two famous couples chatted for several minutes and the two women shared a sweet hug.

Beyonce said: "It's so nice to meet you".

She also congratulated her on the birth of Archie before saying "so beautiful".

 She then said: "We love you guys" before Meghan introduced her to Prince Harry who also gave her a hug.

Harry said: "You've been rather busy."

Jay Z then offered Meghan and Harry a key piece of parenting advice, saying: "The best advice I can give you, always find some time for yourself."