"She is a very dear friend who I have worked with so she was the best fit for my collection as she represents a woman who has her own fashion choices and believes in leading her life on her own terms," Gangwani told IANS.
Kangana wore a glittery gown and completed the look with nude make-up.
She was equally excited to walk the ramp.
"This dress weighs around 30 kg so, I was not walking the ramp but it was pushing me towards the direction. I find Manav's designs extremely amazing and feminine. Couture in India is bridal and I was amazed to see the detailing," Kangana told reporters on Sunday.
Titled Le'amoureuse that means the beloved, Gangwani's collection was sensuous, feminine and larger than life.
The designer took the fashionistas to a floral garden to celebrate the sensuality of a woman depicted through the avenue of fashion.
"Vibrant, romantic, elegant and still with an element of risque is an apt description to this collection, which is a great mix of the feminine and the contemporary. This couture collection showcases the best of what the MG brand is loved for while embracing new colours and silhouettes for the modern Indian woman," said the designer.
The main show area was packed with faces like sarod icon Amjad Ali Khan with his family, Neil Nitin Mukesh, Raveena Tandon and Riddhima Kapoor Sahni apart from the designer's close friends and family.
The show, which was an hour late from the scheduled time, started with a live painting done by award-winning artist G.R. Iranna. The models took the stage simultaneously and presented the collection on the ramp that was longest for the designer.
Kangana also said that it was the longest ramp that she ever walked on.
"It was huge and never-ending. Longest ramp I ever walked on," said the actress.
The collection featured a variety of textures and colours like gunmetal grey, fresh peachy coral, ethereal aqua and finally purple.
A host of opulent fabrics were used to dramatize the garment like sheer tulle, glimmering sequin georgettes; translucent organza and even sheer French laces.
Dreamy ethereal cuts, gown saris, gowns structured seductively to the contours of the body and innovative pant suits were some of the pieces that celebrated the feminine yet modern woman.
"What is unique this year is the play of colour and embellishment with a focus on fabrics and the structures applied to each garment. I've tried to balance what my customer expects of me with conceptual innovation in the pieces," the designer told IANS.
Also, the entire collection was exquisitely embroidered with timeless thread work and rich workmanship, complemented with contemporary applique and sparkling sequins.
Swarovski elements were used imaginatively throughout the collection, adding another dimension to glamour.
"Couture is defined as handcrafted and made to measure clothing, and we at MG Couture believe in that definition and take it a step further by guaranteeing our customers the best of savoir-faire when wearing my brand.
"I cannot comment on other Indian designers, but at MG Couture we begin working on our AICW collection months in advance to ensure this excellence in quality and crafting that are the pillars of couture," said the designer when asked about his definition of couture.