Milo planning Panettiere proposal?

'Heroes' star Hayden Panettiere is set to hear wedding bells in her future after boyfriend and co-star Milo VentimigliaI was spotted ring shopping.

Friends insist the handsome star is so smitten with his teenage girlfriend that he's planning a romantic proposal - for later this year.

A pal tells In Touch magazine: "Milo was looking at rings in late June. He really likes Cartier and intends to spend around $200,000 (€125,708)."

Ventimiglia, 31, and the 18-year-old actress met and fell in love on the set of hit drama 'Heroes'. They have been dating since the beginning of the year.