Lauren Conrad celebrates the wedding of former Laguna Beach co-star Dieter Schmitz and his bride Isa

'We are so happy for you two!' Lauren Conrad celebrates the wedding of former Laguna Beach co-star Dieter Schmitz and his bride Isabell Hiebl

He was one of her best friends on the hit reality show Laguna Beach.

Lauren Conrad couldn't contain her excitement as she watched her former co-star Dieter Schmitz wed his fiancée Isabell Hiebl in Monterey, California on Saturday.

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The 30-year-old, who married William Tell in 2014, attended the wedding set in a gorgeous outdoor setting overlooking the bay and posted a couple of gleeful snaps soon afterwards to spread the joy.

'Married!!!' Lauren captioned a photo of her hugging Dieter with a digital arrow pointed his way, as though followers needed help in determining that.

She looked lovely in a flesh-toned slip gown with spaghetti straps and smooth, figure-hugging lines.

Lauren shared a picture of Dieter and Isabell once the 'I do's' had been said showing the blonde bride in a strapless white embellished gown with long white veil and a bouquet of whilte and blush blooms.

A pair of dangling earrings sparkled amongst Isabell's pale tresses and her make-up was natural toned with beiges and pinks.

Lauren and fellow Laguna Beach star Kristin Cavallari were in a love triangle with Stephen Colletti, but Lauren and Dieter were on good terms at least.

Colletti also shared a gorgeous black and white snap of Deiter and Isabell kissing on a patio at the hotel where they wed.

The cast recently reunited for the 10th anniversary special of The Hills, a spinoff of Laguna Beach.

The 30-year-old, who married William Tell in 2014, attended the wedding set in a gorgeous outdoor setting overlooking the bay and posted a couple of gleeful snaps soon afterwards to spread the joy.

'Married!!!' Lauren captioned a photo of her hugging Dieter with a digital arrow pointed his way, as though followers needed help in determining that.

She looked lovely in a flesh-toned slip gown with spaghetti straps and smooth, figure-hugging lines.

Lauren shared a picture of Dieter and Isabell once the 'I do's' had been said showing the blonde bride in a strapless white embellished gown with long white veil and a bouquet of whilte and blush blooms.

Revelations on The Hills: That was Then, This is Now, left viewers shocked to discover some relationships were manufactured for the screen.

The episode revealed that Lauren Conrad's romance with Kristen's ex Brody Jenner was in fact completely made up.

Though she did concede she had a short crush on the son of transgender icon Caitlyn Jenner, Lauren added: 'We had zero chemistry. It always just felt forced.'

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