The two stars, who began dating in January, showed up arm-in-arm at the 20th Annual Elton John AIDS Foundation Academy Awards viewing party at The City of West Hollywood Park in Beverly Hills Sunday.
Tisdale, 26, was dressed to the nines in a red hot Maria Lucia Hohan dress, Jerome C. Rousseau heels, House of Lavande earrings, Arunashi and MEUS rings and an Edie Parker clutch.
Tisdale and Johnson first met when Tisdale starred in Boys Like Girls' "Love Drunk" music video in 2009; the former High School Musical star was dating music video director Scott Speer at the time.
"They're still going strong," a source tells Us Weekly of Tisdale and Johnson. "She's a firecracker and Martin loves that."
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