You don’t have to be a pro to try out for a part in an upcoming HBO series starring Mark Ruffalo.

An open casting call is being held in the Hudson Valley for speaking and non-speaking parts.

The series, based on the Wally Lamb book, “I Know This Much Is True,” will hold the open calls in Poughkeepsie on Saturday, Feb. 23, said Rita Powers Casting on the Hudson Valley Film Commission’s Facebook page.

The call will take place from 11 a.m. to 4 p.m.,  at 22 IBM Road in the Town of Poughkeepsie for the series which will begin filming in March in Dutchess, Ulster, and Delaware counties.

The performances, including extras, are paid and include parts for all ages from newborn to adults

If you plan on trying out, a good tip to remember is the show takes place from the 1920s to early 1990, so no modern looks.

In case you haven’t read the wonderful book, to help direct you in selecting what to wear, HBO says the series follows the lives of twin brothers in a story of betrayal, sacrifice, and forgiveness.

Before you can audition, you must fill out a sign-up sheet posted on the Film Commission’s Facebook page and bring it with you to the tryout.

According to the sign-up sheet, if selected, performers will be paid the standard rates   up to $1,009 for a day performer and $170 for an extra.

For anyone who has ever dreamed of appearing in an HBO series with Mark Ruffalo, this might be your best chance