Smoke billowing from timber doors welcomed the Minnesota Vikings to the Wembley field ahead of their clash against the Pittsburgh Steelers this evening.
The teams tweeted video and pictures of the atmosphere from the ground before kick off.
More top news
Thirty facts about Prince Harry to celebrate his coming of age.
Django Unchained actress Danièle Watts was handcuffed by police after she was seen "showing affection" to her partner, NBC News reported.
A US news anchor has told viewers he only has four to six months to live on air, after he was informed that his brain tumour was inoperable.