MARKHAM – After the huge success of the 2023 inaugural Markham Talent  (www.markhamtalent.ca), the Open Casting Call is back again this year, in partnership with the Markham Arts Council (www.markhamartscouncil.com).   All performing artists including singers, songwriters, musicians, dancers, actors, models and other entertainers are invited to submit their talent to compete in the 2024 Markham Talent Open Casting Call open to …