Anne Hathaway gatecrashed Tom Grennan’s rehearsal as he geared himself up to perform on The Graham Norton Show.

The Not Over Yet singer, 27, was practicing backstage at the BBC studios when the Princess Diaries actress, 40, snuck up on him.

In a video posted on Tom’s Instagram, the Remind Me singer is seen harmonizing with his group before The Witches star pops her head around the corner.

Looking very much like that Kim Kardashian peeking meme, Anne looks like she’s loving the tune as she mouth along to the lyrics and nods her head in appreciation.

After giving Tom and his team a clap, the Les Miserables actress steps out from the shadows and strolls up to the All These Nights chart-topper.

While she initially extends her arm for a polite handshake, instead the duo hug it out, with Tom very much keeping his cool – even if he looks a tad surprised to see a Hollywood megastar lurking around.

So far, so normal, Tom is rehearsing with his team ahead of the show (Picture: Instagram)

Except that Anne Hathaway is hiding around the corner (Picture: Instagram)

Tom appeared on the beloved chatshow, during which he performed new single Here, alongside Salma Hayek Pinault, Shania Twain, Lizzo, Julianna Moore and Johannes Radebe.

Pop icon Shania spoke about her open throat surgery, which she had left her previously fearing she would never be able to sing again.

However, in conversation with Graham, the 57-year-old hailed the procedure as a ‘miracle’ and joked she was now able to sing ‘very loud’ and ‘swear really loudly.’

Anne looked like she was loving Tom’s performance (Picture: Instagram)

She explained: ‘The operation was very invasive, and I’ve got a big scar that I am proud of.

‘I’m very happy to have a scar rather than no voice. The surgery was a miracle, and I am so grateful.

‘Going back into a studio after the operation was a discovery and I was re-learning my voice.’

Tom and Anne go straight in for a hug (Picture: Instagram)

Meanwhile, Julianne teased her new film Sharper, a psychological thriller which she said was ‘so much fun to shoot’ and ‘surprising.’

More: Trending

‘The script was wonderful, and I never knew what was coming when I read it. It stays one step ahead of you the entire time,’ she added.

The Graham Norton Show continues on Friday on BBC One at 10.40pm.

Got a story?

If you’ve got a celebrity story, video or pictures get in touch with the Metro.co.uk entertainment team by emailing us [email protected], calling 020 3615 2145 or by visiting our Submit Stuff page – we’d love to hear from you.

MORE : Tom Grennan devastated after young fan dies the night before her 9th birthday: ‘My little superstar’

MORE : Anne Hathaway’s euphoric carefree dancing at Paris Fashion Week is ‘a total vibe’

Anne is apparently a big Tom fan.