Since splitting with Drew Barrymore in July, Justin Long has been spending time with Kirsten Dunst — and it’s more than just a rebound fling.

“They’ve been dating for more than a month. They started hanging out after meeting at the Bowery Hotel,” an insider tells In Touch. It’s getting so serious that Kirsten’s already buying bling for him. On August 26, Kirsten bought Justin, 30, a Chrome Hearts sterling silver dog tag accented with diamonds at a West Hollywood boutique. “This would look great on Justin,” Kirsten was overheard telling a pal when she spotted the $1,150 necklace. The insider says, “It was obvious she liked shopping for him!”

“Justin has been spending a lot of time at Kirsten’s New York apartment,” the insider reveals.

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