Sarah Warda Hartzog and Luke Hartzog, a girl; Alexandra Catherine Hartzog, April 11, Los Angeles. Mother’s veep and account director at United Entertainment Group; father is a non-pro.* * * Tammara Billik and Jacqueline Fowler, a boy; Eli Benjamin Billik, April 8, Los Angeles. Billik is a partner in Billik/Wood Casting; Fowler’s a writer. * * * Courtney and Darren Reagan, a boy; Nicholson Patrick Reagan, April 6, Chicago. Mother’s a non-pro; father’s a producer.