Catherine Zeta-Jones is cheered on by her son at Las Vegas Grand Prix

Catherine Zeta-Jones was cheered on by her son Dylan as she waved the starting flag at the Las Vegas Grand Prix. The actress, 56, shared a clip of herself waving the famous black and white chequered flag as her son filmed. The flag marks the end of any practice session, qualifying session or race, and is waved until all competing cars have reached it.