Priyanka Chopra celebrated her sister-in-law Neelam Upadhyaya's birthday with a heartfelt Instagram post. Sharing a throwback photo with her brother Siddharth and Neelam, the trio flashed bright smiles. Priyanka looked stunning in blue, sending warm wishes to Neelam. Siddharth and Neelam registered their marriage and had a roka in August.