O'Nell married Indian actress Sweta Keswani in four different ceremonies (Court, Buddhist, Hindu, and Christian). In 2011, the couple reportedly separated.
O'Nell is a Licensed Paragliding Pilot who has been flying since 2020 in The Netherlands, India, and South Africa.
O'Nell is a Certified 'Open Water Diver', gaining his PADI certification in 2021.