The Good Liar (2019)

Career con artist Roy Courtnay (Sir Ian McKellen) can hardly believe his luck when he meets well-to-do widow Betty McLeish (Dame Helen Mirren) on-line. As Betty opens her home and life to him, Roy is surprised to find himself caring about her, turning what should be a cut-and-dry swindle into the most treacherous tightrope walk of his life.