Washington [US], October 5 (ANI): In a heartfelt show of camaraderie, actor David Henrie expressed his gratitude to long-time friend and former co-star Selena Gomez for her support during the premiere of his new film, ‘Monster Summer’. The screening took place just ahead of Halloween, and Gomez was in attendance to cheer on Henrie, according to People magazine. On October 4, Henrie shared a touching message on his Instagram Story, referring to Gomez as “Sis.” He wrote, “I am always grateful for your support and your belief in me,” after she praised his film. Gomez, who is known for her hit son…