Guest Stars Janel Parrish as Mona Vanderwaal Keegan Allen as Toby Cavanaugh Tammin Sursok as Jenna Marshall Torrey DeVitto as Melissa Hastings Drew Van Acker as Jason DiLaurentis Brendan Robinson as Lucas Gottesman Brant Daugherty as Noel Kahn Bryce Johnson as Darren Wilden Ryan Merriman as Ian Amanda Schull as Meredith Sorenson