Video: Sienna Miller the queen of boho-chic joins dapper Kevin Costner at premiere of his $100m new drama Horizon: An American Saga
[video_shortcode_video_html_5 src="https://videos.dailymail.co.uk/video/mol/2024/06/25/1436741444930456863/1024x576_MP4_1436741444930456863.mp4" itemprop="image" content="https://videos.dailymail.co.uk/video/mol/2024/06/25/1436741444930456863/1024x576_MP4_1436741444930456863.mp4" data-src="https://videos.dailymail.co.uk/video/mol/2024/06/25/1436741444930456863/1024x576_MP4_1436741444930456863.mp4"]