Wedding and garden party season is here, and we couldn't be more excited. If you're looking for style inspiration or would like to invest in a new piece for a special event you have planned in the months ahead, then Red fashion director Oonagh Brennan has you covered.

Oonagh has searched high and low to bring you her edit of the 5 key pieces you need in your repertoire to update the occasionwear section in your capsule wardrobe.

From the statement red dress you'll want to wear at every event to the chic silky pyjamas that will make you feel instantly pulled together, watch Oonagh style her hero pieces in the video above and shop her top picks below...

1) The classic cream dress

Whether you're heading to a formal work event or you want to look smart for a party, Oonagh's favourite "piece of all time" is a classic cream dream dress by Toteme. "It's got this gorgeous little overlay, which makes it great for hiding any strapless bras or underwear lines and it's got a gorgeous dipped hem at the back, which is just so flattering," Oonagh says.

Toteme TotemeStrapless cotton-blend midi dress

TotemeStrapless cotton-blend midi dress

Toteme TotemeStrapless cotton-blend midi dress

£480 at Matches Fashion

Wondering how to accessorise your dress? "With a really simple classic dress like this you need to keep your accessories really elegant", according to Oonagh who styled hers with the Sunrise mules from Russell & Bromley and chunky Kenneth Jay Lane gold earrings.

Shop more of Oonagh's top picks...

Sunrise Mules
Russell & Bromley Sunrise Mules
Mini Dome Huggie Hoop Earrings
Missoma Mini Dome Huggie Hoop Earrings
Daniela bandeau cotton-blend midi dress
Staud Daniela bandeau cotton-blend midi dress
Now 30% Off
Strapless Dress
MANGO Strapless Dress


2) The statement floral dress

If your calendar is filling up with smart summer events, then a statement floral dress like Oonagh's high-street hero piece from & Other Stories should be your new-go to.

"You might think this dress is designer but no, it's from & Other Stories. I love the embellishments, it's a great to do florals without having a big floral print."

& Other Stories Floral Embroidered Midi Dress

Floral Embroidered Midi Dress

& Other Stories Floral Embroidered Midi Dress

The piece features delicate lilac sequinned flowers all over it, perfect if you prefer a romantic floral print to a bold bloom.

Styling a statement floral dress couldn't be easier either, and Oonagh suggests opting for a cat-eye shades to add some Hollywood glamour to your look.

Shop more of Oonagh's top picks...

Neutral Feather Clutch Bag
Mint Velvet Neutral Feather Clutch Bag
Forever Comfort Bow Trim Curvy Heel Court Shoes
Next Forever Comfort Bow Trim Curvy Heel Court Shoes
Cat Eye Sunglasses
Anthropologie Cat Eye Sunglasses
Now 42% Off
Boned Broderie Anglaise Maxi Dress
& Other Stories Boned Broderie Anglaise Maxi Dress

3) The chic pyjamas

Wearing pyjamas to a party? They're the coolest, comfiest option when the mercury's rising, so go for it! To ensure that you look more bouji than bedtime, Oonagh advises plumping for a silky set like her playful polka dot Rixo pick.

Rixo Annabelle Pyjama Set

Annabelle Pyjama Set

Rixo Annabelle Pyjama Set

"Keep it quite fitted, don't go too oversized," she says. "These trousers are great as they're three-quarter length and the little lace trim adds extra detail."

The key to elevating your look lies in the accessories. Oonagh goes maximalist with hers, pairing her co-ord with tasselled earrings and platform gold heels for an individual style – no fear of matching another guest here.

Shop more of Oonagh's top picks...

Annabelle Lace Trim Pyjama Set
Rixo Annabelle Lace Trim Pyjama Set
Bobbie Frilled Pyjama Set
Rixo Bobbie Frilled Pyjama Set
Gold Metallic Platform Sandals
Air & Grace Gold Metallic Platform Sandals
Raphael Earrings
Sezane Raphael Earrings

4) The red dress

Red is the colour of the season, so be daring and swap your LBDs for LRDs this summer, starting with this joyful bow-neck mini from Staud.

"The shorter length is much more wearable if you have a high neckline and a little bit of sleeve coverage; you won't feel quite so bare," says Oonagh.

Staud Ilana bow-neck moiré mini dress

Ilana bow-neck moiré mini dress

Staud Ilana bow-neck moiré mini dress

Now 40% Off

She's gone unapologetically bold with her accessories, opting for slick black cat-eye shades, gold hoops and some Loeffler Randall gold mules. Her final tip to nail this style? "Make it feel less Christmassy by adding a raffia bag."

Shop more of Oonagh's top picks...

Satin Bow Midi Dress
Rixo Satin Bow Midi Dress
Feather Midi Dress
Mint Velvet Feather Midi Dress
Emilia 50 pleated-lamé sandals
Loeffler Randall Emilia 50 pleated-lamé sandals
The Cannes Natural Raffia Bag
DeMellier The Cannes Natural Raffia Bag

5) The tailored suit

Our list wouldn't be complete without a tux, and Oonagh's favourite is this cream longline blazer and relaxed wide-leg trouser pairing from ME+EM.

ME+EM Tux Longline Blazer

Tux Longline Blazer

ME+EM Tux Longline Blazer

"The oversized slouchy silhouette feels modern," she says. "Don't be afraid to just wear a bra or a lace camisole underneath for a little flash of skin."

Keep your accessories monochrome. Oonagh has chosen black platforms from M&S, a raffia clutch from Demellier at Matches, and "little gold hoops for that Studio 54 touch".

Shop more of Oonagh's top picks...

Leather Platform Sandals
M&S Leather Platform Sandals
Fiji Huggie Earrings
Monica Vinader Fiji Huggie Earrings
Now 30% Off
Michele Jacket
Sezane Michele Jacket
Margeaux Collarless Double-Breasted Blazer
Reiss Margeaux Collarless Double-Breasted Blazer