US First Lady Michelle Obama today gave her own personal good luck message to Team USA ahead of tonight's opening ceremony for the Olympics.
Mrs Obama urged America's athletes to "have fun, breathe a bit, but also win", as she met them at their training base in east London.
The First Lady is leading the US presidential delegation which includes a ringside seat at tonight's ceremony.
She began her trip to the capital with a visit to the University of East London, Team USA's home during the Games, and will also take part in a Let's Move! event, as well as joining a reception at Buckingham Palace.
Mrs Obama, sporting a red top and red and white jacket, wished her Olympians good luck at a breakfast event.
She spoke of her fond memories of the Olympics.
After her speech, Mrs Obama met the athletes, posing for photographs, before leaving for a Let's Move! sporting event at the US Ambassador's residence in central London for about 1,000 US military children plus US and British students.
The initiative, created by the First Lady, aims to combat childhood obesity within a generation.