Sienna Miller remembers “cool dad” George Harrison at son Dhani’s 18th birthday party

British actress Sienna Miller, currently starring in Sky miniseries War, has reminisced to NME about her friendship with George Harrison‘s son Dhani – including a detailed description of the late Beatle’s country estate Friar Park, which she visited in 1996 for Dhani’s 18th birthday party. Watch the full video interview above or on YouTube. Read more: The Beatles: every song ranked in order of greatness Located in Henley-On-Thames, Oxfordshire, Friar Park is famous for its extensive gardens and neo-Gothic architecture. Harrison bought the property in 1970, immortalising its front lawns on the cover of his solo album ‘All Things Must Pass’ which came out the same year. “It’s amazing. It’s unbelievable,” said Miller, whose parents knew the Harrisons through her mother Josephine’s close friendship with George’s first wife Pattie Boyd. The Layer Cake star was 14 years old when Dhani turned 18. “It’s very hallucinogenic… They’ve got an amazing underground sort of stalagmite or stalactite cave that you can go into on boats – and there’s a sort of mountainside effect. It’s stunning.” Friar Park, owned by George Harrison’s estate, in Oxfordshire. CREDIT: David Goddard/Getty Images There wa...