justin biber 1
justin biber 1

Hailey Baldwin was spotted kissing Justin Bieber in New York on Thursday.

The burgeoning model, 24, donned a unique yellow trench coat as she leaned over to plant a peck on her pop star husband, 26, during a stop on a Big Apple sidewalk.

And the impromptu PDA session comes a day after Hailey's sister Alaia said the couple - who tied the knot last September in a secret courthouse ceremony - are 'very up and down' with their formal wedding plans.

Daring to impress, Hailey rocked an all-white ensemble under the fashion-forward coat that boasted silver metallic ball embellishments.

The Boyfriend singer donned a light blue hoodie and beanie as he kept a low profile in retro shades.

They tied the knot last September in a secret courthouse ceremony.

Meanwhile, the couple's long-awaited formal wedding has not yet eventuated, and may not happen for some time says the model's sister, Alaia.

Justin Bieber and wife Hailey Baldwin go for a stroll in NYC

'We will see. Who knows what their plans are,' said the 26-year-old daughter of Stephen Baldwin, in an interview with Us Weekly on Wednesday.

The EndoFound junior board member continued: 'They’re very up and down, so I just I’ll be there at some point in a dress, in sweats - we don’t know!'

In March, a source told the gossip site that plans for a wedding which included family and friends of the couple were put on hold due to Justin's fragile mental state.