Actress shows off sparkler on red carpet

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Jessica Biel has fuelled speculation she’s to marry her boyfriend Justin Timberlake.

The actress wore a ring on her engagement finger at the LA premiere of Valentine’s Day on Monday.

And she looked stunning in an Oscar de la Renta gown.  

Justin, 29, has been dating Jessica, 27, for three years.

SEE PICTURES All the stars at the Valentine’s Day premiere>>

Jessica Biel's hand | Jessica Biel's hand with ring on engagement finger at the Valentine's Day premiere in LA | Now Magazine | Celebrity Gossip | Pictures