and her boyfriend Oli Green put on a loved-up display on Sunday as they chatted with and his wife Christine during the New York Knicks game.
The actress, 41, has been dating Oli, who is 15 years her junior, since February last year.
The couple were clearly very immersed in the basketball match as they supported at Madison Square Garden with 20,000 fans.
Sienna and Oli looked cosy as they held hands and took pictures together, as the Edge Of Love star looked stunning in a leather jacket with green and red panelling detail.
She paired the look with denim-style wide leg trousers and opted for little to no make-up for a casual appearance for a sporty day out.
Loved-up: Sienna Miller, 41, looked loved-up as she held hands with boyfriend Oli Green, 25 at the New York Knicks game at Madison Square Garden on Sunday
Celebrity audience: The couple were spotted alongside Ben Stiller and his wife Christine Taylor
She wore a NY Knicks cap as she got into the spirit of the game, cheering on the team to a 102-93 victory.
The Vogue model engaged in a very animated discussion with comedian Ben as she leaned across Oli – whilst keeping an affectionate hand on his knee – to discuss the ins and outs of the game from the front row.
Ben, 57, chat and his wife Christine also chatted enthusiastically about the match – after reuniting during the coronavirus lockdown following an initial split in 2017.
Sienna and Oli have been dating since February 2022, making a slew of sweet appearances together since as they took their relationship public.
It comes after Sienna recently said she spent .
The actress revealed she thought she would be married with children by her 30s but the relationships she was in during those years didn’t work out.
Speaking to British Vogue, Sienna said: ‘I’d invested what felt like the important years in something that was just a bucket with a hole in it of a person. I wasted time. And I felt like time was really my currency.’
She was quick to point out she was not referring to Tom Sturridge, who she dated from 2011 to 2015 and shares daughter Marlowe, ten, with.
Important conversation: The actress leaned over Oli, while affectionately touching his knee, to animatedly discuss the game with Ben
Getting into the spirit: The four threw their hands up in the air as they supported the Knicks to their 102-93 win
Happy couple: Sienna and Oli have been dating since February 2022, despite him being 15 years her junior
class=”fff-inline”
data-fff_url=”https://i.dailymail.co.uk/1s/2023/04/24/11/70165359-12006977-image-m-38_1682333882651.jpg” data-fff_person_name=”Sienna Miller” data-fff_product_id=”1062051″
data-fff_product_types=”jacket,jackets” data-fff_trends=”colour block,green,leather,navy,panel,red” data-fff_article_id=”12006977″
data-fff_main_title=”Steal Sienna's style in a colour-block leather jacket by Gucci” website
data-fff_capped_bodys_first_paragraph=”We've been obsessed with Sienna Miller's style for years and she just keeps o…” data-fff_share_url=””
data-fff_preview_title=”Steal Sienna's style in a colour-block leather jacket by Gucci” data-fff_open_main_overlay_on_hover=”false”>
Making memories: The couple took pictures and selfies together as they made the most of the experience
Stunning: The former Vogue model donned a leather jacket with green and red panelling, which she paired with wide-leg denim-style trousers
Good game: The A-listers were thrilled as they cheered on the New York Knicks against the Cleveland Cavaliers
Couple: Ben and Christine initially separated in 2017 after 17 years of marriage but reunited during the coronavirus lockdown
Sightings: Comedian Pete Davidson (second left) was also spotted in the celebrity audience
Victory: New York Knicks guard Josh Hart (3) reacts after scoring in the second half of Game 4
But the pair proved that they were on friendly terms recently, as they partied at this year’s Glastonbury festival this summer with their respective partners – Oli and Alexa Chung.
Prior to her relationship with Tom, Sienna was engaged to fellow actor Jude Law in 2004 after he popped the question on Christmas Day.
He apologised to her in July of the following year for having an affair with the nanny of his children.
Sienna also had a highly publicised affair with the actor Bathlazar Getty in 2008.
Reflecting on her thirties being difficult, she added: ‘There was a lot of anxiety. Relationships hadn’t worked out – I imagined that I would be married with three kids, being a great mum. I love being a mother. It’s what I do best.’
