Bewildered Londoners witnessed Jedward making waves, as they were spotted being chased across the murky waters of the Thames by a swarm of menacing sharks.
Escaping by the skin of their teeth, the pair was seen racing up the Thames on a speedboat, just about making it to safety in what weathermen are calling: a Sharknado! Sharknado 3: Oh Hell No! premieres in the UK on Thursday 23 July at 10pm on Syfy. Sharknado 3 is the third installment of the hugely popular Sharknado franchise, for which Jedward wrote and performed the film's theme song.
Jedward appear in the action-packed film alongside a cast that includes Ian Ziering, Tara Reid, Cassie Scerbo, David Hasselhoff and Bo Derek.
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