In 2016 , Bell Calloway was cast as lead character in the Bounce TV first prime time soap opera , '' Saints & Sinners '' . She plays Lady Ella Johnson , the widow of pastor and manipulative " First Lady of the Church " . Also in 2016 , Bell Calloway co-starred as president Obama 's future mother-in-law , Marian Shields Robinson , opposite Tika Sumpter as Michelle Obama , in the comedy-drama film '' Southside with You '' , which premiered at the 2016 Sundance Film Festival . She also guest starred on the ABC medical drama '' Grey 's Anatomy '' playing Arizona 's Lawyer
2016 Sundance Film Festival
2016 Sundance Film Festival
Vanessa Bell Calloway