27 July 2013
Last updated at 17:15 ET
Anticipation built on Friday as London's Olympic Stadium prepared to stage the Anniversary Games, marking one year since the opening of the 2012 Olympics.
Athletes warmed up in the stadium ahead of event on Thursday evening - American hurdler David Oliver among them.
On Friday evening, Jamaican sprinter Usain Bolt arrived at the stadium in Stratford - where he won 100m and 200m gold a year ago - in typically flamboyant style.
Londoner Perri Shakes-Drayton just missed out on the 2012 Games, but on Friday she clocked up a personal best in the 400m hurdles - in some eye-catching footwear.
The Olympic champion and world number one pole-vaulter, America's Jennifer Suhr, was among the competitors. Here she grabs chalk in preparation.
German pole-vaulter Silke Spiegelburg was among those showing off her skills as dusk began to fall over London.
Great Britain's 4x100m women's relay team did not make the 2012 final a year ago, but on Friday night Ashleigh Nelson (pictured), Dina Asher-Smith, Anyika Onuora and Annabelle Lewis won convincingly.
Usain Bolt rounded off Friday's action by powering to a comfortable victory in the men's 100m, recording his fastest time of the year at 9.85 seconds.
Fans had not forgotten Mo Farah's unique "Mobot" celebration from one year ago as the Anniversary Games continued in glorious sunshine on Saturday.
The man himself gave a sell-out crowd plenty to cheer as he eased to victory in the 3,000m, setting a personal best time.
And his fans weren't the only ones celebrating.
Another of Britain's 2012 heroes, Jessica Ennis-Hill, struggled with injury as she came last in the long-jump and ran half-a-second slower than her Olympic time in the hurdles. She said she did not know if she would be fit for the World Championships in August.