https://www.hollywoodreporter.com/live-feed/dynasty-adds-fan-favorite-character-help-offset-departures-1196465

The ER alum will take on the role originally played by Diahann Carroll on the original Dynasty. Michele will make her debut later this season, with the possibility she'll become a full-fledged series regular next season. Michele's most recent TV roles were on Star and Queen Sugar.

"Dynasty‘s" Michael Michele — aka Dominique Deveraux — has been promoted to series-regular status ahead of Season 3 (premiering Friday, Oct. 11 at 9/8c on The CW), according to the actress’ Instagram.

https://tvline.com/2019/07/17/law-and-order-svu-ian-mcshane-cast-season-21-premiere-nbc/

"Dynasty‘s" Michael Michele — aka Dominique Deveraux — has been promoted to series-regular status ahead of Season 3 (premiering Friday, Oct. 11 at 9/8c on The CW), according to the actress’ Instagram.

https://tvline.com/2019/07/17/law-and-order-svu-ian-mcshane-cast-season-21-premiere-nbc/
Ian McShane looks rough. As for Dominique Deveraux, she never had much of a part and was eventually written out, this being her best scene: https://youtu.be/Q7hTFqBmHH0