Washington [US], June 10 (ANI): Actor Natalie Portman recently celebrated her birthday and on this special occasion, she expressed her gratitude towards her friends, who stood by her in tough times, according to People. Taking to her Instagram handle, she posted several pictures with her close friends and wrote a sweet caption dedicated to them, “This year, on my birthday, I want to celebrate my gratitude for my friends who lift me up again and again.” https://www.instagram.com/p/C8AF2IcJS8z/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA== In the pictures, she can be seen posing with her fri…