Sienna Miller and Tom Sturridge threw a joint party to celebrate their birthdays in London on Thursday night (05Dec13). The stars both have a birthday later this month (Dec13), so their friends turned out for an early celebration in the British capital. Twilight actor Robert Pattinson was among the guests at the bash, which was held at a venue in Notting Hill, west London, along with socialite Poppy Delevingne. Pattinson was seen leaving the bash with Miller and Sturridge, who were carrying armfuls of unopened gifts. Miller turns 32 on 28 December (13), and her partner will be 28 on 21 December (13).