In addition to starring, the 49-year-old star will produce the limited series, which marks the first project announced under Annapurna Pictures' new TV initiative, reported Entertainment Weekly.
Semple will write the adaptation and also serve as an executive producer alongside Annapurna's Megan Ellison and Sue Naegle. A network is not yet on board.
"Today Will Be Different" chronicles the story of Eleanor Flood, who had ambitions to wake up and have the best day of her life, but is forced to abandon those plans when she finds a strange, new future unfolding.