Pia Miller's fiancé, multi-millionaire Hollywood agent Patrick Whitesell, jetted into Australia from Los Angeles last month. Loved-up: Actress Pia Miller and her fiancé, Patrick Whitesell, enjoyed a lunch date with her teenage sons, Isaiah and Lennox, in Sydney's Bondi Beach on Sunday The brunette looked effortlessly chic in an ankle-length black dress, which flattered her slender frame beautifully. Pictured with …