'That was the most beautiful thing I have ever witnessed': Adele invites sprinkler fitter and his new fiancee on stage after she sees him propose in the audience during 'their song'

The millionaire singer was performing her hit song 'Make You Feel My Love' on the first night of her sell-out eight-date run at the 02 Arena in London.

In the audience sprinkler fitter Johnny Biggle got down on one knee and pulled out a ring (inset) for his long-term partner Natalie King during 'their song' and Adele shouted 'someone just proposed' and told them to 'get up here' (left). 

The couple, from south London, who have a young son, Alfie, were cheered on by thousands of fans as they described how after 12 years together they were going to get married. 

Miss King wiped away tears of joy (right) as she joined Johnny on stage and hugged the star, who thanked them for choosing to get engaged at one of her concerts, during one of her biggest hits.