Prince Albert of Monaco’s love child Alexandre Grimaldi-Coste, 18, is pictured in Rome

Prince Albert of Monaco‘s love child Alexandre Grimaldi-Coste, 18, enjoyed dinner at top Italian restaurant in Rome last night with his flight attendant mother.

Alexandre, 18, is the child of Prince Albert and his former mistress Nicole Coste, 50,  a former Air France flight attendant from Togo.

Looking suave in a grey jumper, blue chinos and box fresh white Converses, Alexandre was the picture of casual cool as he walked through the Italian capital and ate dinner at Dal Bolognese Roma.

Albert, 64, confirmed he was the biological father of Alexandre in May 2005, just before he was enthroned as Prince of Monaco, 

As his parents never married, Alexandre is not in the line of succession to the  Monegasque throne.

Albert also has daughter Jazmin, 30, with US estate agent Tamara Rotolo and seven-year-old twins Jacques , heir apparent to the throne, and Gabriella with his wife Princess Charlene.

It comes as Charlene, 44, has been seen with her children and husband for the first since November after spending time in treatment facility for ‘exhaustion’.

In January, all four of Prince Albert’s children were pictured together for the first time in a picture shared by Jazmin.

The photo was shared by Jazmin on Instagram as part of a ‘year in review’ slideshow, capturing some of the highlights of the year.

The image shows California-based Jazmin, whose mother met Albert on the Côte d’Azur, dressed down in a jeans and a crop top, with her hair in pigtails. 

She has one arm around Alexandre, who is wearing basketball shorts and a T-shirt, and the other around Gabriella. 

Gabriella smiles sweetly in grey jeans and a pink padded coat, with her hands clasped in her lap. On her other side is her twin brother Jacques, looking off camera, who has a protective hand around his sister. 

 The twins have been surrounded by love from members of their family over recent months as their mother Charlene battles health issues.

A DNA test in May 2006 confirmed Albert was the father of Jazmin Grace, the result of an affair with Tamara Rotolo, an American estate agent he met while she was on holiday in the South of France.

Her mother, then a waitress, had a fling with the monarch back in 1991, while on vacation. Jazmin was born in 1992 and Alexandre in 2003.

Now a real estate agent, Tamara took Jazmin to California with her and she only met her father aged 11.

Talking about meeting her father for the first time, she said back in 2015: ‘I wanted that moment to connect with my father, to get to know him, and to have him get to know me,’ Jazmin, a trained opera singer, said.

‘Not having had that figure around, I missed that. It’s wonderful that it happened when it did, and we’ve been enjoying a great relationship ever since.’

In August, Jazmin revealed her close relationship with Alexandre as she marked his 18th birthday in a sweet Instagram post.

She shared a series of Instagram posts from her half-brother’s birthday party writing: ‘It’s a celebration. Happy birthday my little brother Alexandre!’

In January, Prince Albert attended the St Devote Day cathedral service without his wife Princess Charlene  alongside Princess Gabriella and Prince Jacques and his sister Princess Caroline.

Nicole was also spotted at the principality’s traditional ceremony – which marks the national holiday in remembrance of Monaco’s patron saint, a Christian martyr who was killed and tortured for her faith in the 4th century.

It’s been a tough year for the House of Grimaldi, with rumours of strife between Prince Albert and Princess Charlene while the monarch faces yet another paternity suit.

The Monaco royal palace released a family photograph for Easter, marking the first time Charlene, 44, has been seen with her children since November. 

 The princess spent several months in a treatment facility after being admitted following her return from a 10-month absence in South Africa.

She faced a variety of health problems, including what the palace has previously referred to as a ‘state of profound general fatigue’. 

The Monaco palace has consistently denied media reports of a rift between Charlene and the principality’s ruler Prince Albert, who were wed in 2011, following the princess’ long absence.

‘She was clearly exhausted, physically and emotionally. She was overwhelmed and couldn’t face official duties, life in general or even family life,’ Albert told People magazine in November.

Zimbabwean-born Princess Charlene was hospitalised after collapsing in September in South Africa, where she had been living for several months.

She underwent surgery in October for an ear, nose and throat infection after checking in under a pseudonym in a Durban hospital, a palace source said at the time.

Friends previously told Page Six that the mother-of-two ‘almost died’ while she was in her home country, while her husband spoke out to say she is suffering from ‘exhaustion, both emotional and physical’.

Charlene is now back in Monaco, although she has yet to return to royal engagements.

Charlene’s time away followed fresh allegations last December that Albert had fathered a love-child (which would be his third, if proven) with an unnamed Brazilian woman during the time when he and Charlene, a former Olympic swimmer for South Africa, were already in a relationship.

Neither party is now commenting, suggesting some kind of generous settlement may have been reached, as happened with Albert’s earlier love children.

Both Jazmin and Alexandre were struck off Monaco’s line of succession in return for vast financial settlements.

While she was in South Africa ,Prince Albert hit back at rumours marital woes insisting Charlene ‘didn’t leave in a huff’ and remains in South Africa only because of ‘medical complications’ following a ‘severe ear, nose and throat infection’.

The royal told People that the speculation over the state of his relationship with the Olympic swimmer has ‘affected’ them both, but that he didn’t address it early because he ‘was concentrating on taking care of the kids’

Lifestyle magazines across Europe have speculated feverishly that the royal couple could be headed for divorce. 

Historian Philippe Delorme said that ‘lots of people got the impression it was an arranged marriage’ between Charlene and Albert, adding: ‘Albert chose a wife who resembled his mother, and Charlene clearly felt very ill at ease in this Grace Kelly role they wanted her to play’

Princess Charlene met Prince Albert in 2000 during a swimming competition in Monaco and the pair married in 2011, before welcoming twins Gabriella and Jacques in 2014.

Born in Rhodesia- a previously unrecognised state in Southern Africa colonised by the British, she relocated to South Africa aged 11.

She had a successful swimming career and went on to win three gold medals and a silver medal at the 1999 All Africa Games in Johannesburg, as well as representing South Africa at the 1998 and 2002 Commonwealth Games and winning a silver medal in the 4 × 100 m medley relay in the latter competition.

However the pair’s marriage has made numerous headlines over the years, with a third paternity suit emerging last year.

Soon afterwards Charlene shaved half her head in the style of a punk rocker last December.