Michelle Obama had a secret meeting with Meghan Markle

Michelle Obama has recently been holding talks in London to promote her new memoir, Becoming, and on one such occasion, there was a special guest in the audience: her friend Meghan Markle.

The pair were reunited at the Royal Festival Hall, and Michelle discussed the encounter with Ryan Seacrest, who was keen to know if she'd known about the surprise appearance.

'Yeah, we're used to keeping secrets,' she divulged, though she kept tight-lipped about what the two chatted about.

Kensington Palace confirmed to HELLO! that the Duchess had attended in a private capacity and that the pair had a conversation after the event.

The two women certainly seem to have a close relationship, with the former FLOTUS relating to Meghan's life an interview with Good Housekeeping.

'Like me, Meghan probably never dreamt that she'd have a life like this, and the pressure you feel – from yourself and from others - can sometimes feel like a lot. So my biggest pieces of advice would be to take some time and don't be in a hurry to do anything,' she said.

'I spent the first few months in the White House mainly worrying about my daughters, making sure they were off to a good start at school and making new friends before I launched into any more ambitious work,' she added.

We can imagine Meghan found this advice really useful as she embarked on her royal duties.