Mischa Barton's 'huge diamond ring' sparks engagement rumours

London, September 14 (ANI): Mischa Barton has sparked rumours that she is engaged to boyfriend Sebastian Knapp, after she was spotted wearing a huge diamond ring on Wednesday night.

The 'OC' star wore the jewel as she arrived for the afterparty following the official opening night of Steel Magnolias at Harry's Bar in Dublin, Ireland, the Daily Mail reported.

The 26-year-old actress appeared happy to show off her new accessory, smiling for waiting photographers as she made her way inside.

She wore a loose-fitting jumper with black skinny jeans and brown boots, accessorising her outfit with a colourful scarf.

Barton and the '28 Days Later' actor Knapp went public with their relationship in July, a few weeks after the actress had spoken about her self-imposed man ban.

She has previously dated oil heir Brandon Davis and The Kooks frontman Luke Pritchard.

However, a spokesperson for Barton said that she was wearing the ring as wardrobe for the opening night of her play. (ANI)