Zelda Williams couldn't help but glow this weekend.br The 25-year-old actress hit her first red carpet since the death of her father, Robin Williams, last August—and it was a joy to see her smile.br Williams attended the grand opening of the Melrose Place location of the celeb-favorite Nine Zero One Salon on Sunday, her fellow guests including Vanessa Lachey (in her first big outing since birthing baby No. 2), Nina Dobrev, Julianne Hough, Ashley Tisdale, Emma Roberts and Jennifer Morrison.