This King's Birthday, while most Australians are enjoying a well-earned day off, savvy investors might be contemplating how to build a portfolio worthy of royalty.

And what better way to do that than with a curated selection of ASX exchange traded funds (ETFs) that aim to provide global reach, long-term strength, and a touch of innovation.

With that in mind, here are five ASX ETFs that could be fit for a king. They are as follows:

Betashares Australian Quality ETF (ASX: AQLT)

Like a kingdom built on strong foundations, the Betashares Australian Quality ETF invests in high-quality Australian companies that display superior financial health, return on equity, and earnings stability. These are businesses that have weathered many economic storms and come out stronger. For investors seeking homegrown royalty, this ASX ETF could be a worthy cornerstone. It was recently named as one to buy by the team at Betashares.

VanEck Morningstar Wide Moat ETF (ASX: MOAT)

No royal castle is complete without a moat, and this ASX ETF is built on exactly that concept. The VanEck Morningstar Wide Moat ETF targets U.S. companies with sustainable competitive advantages and fair valuations. From elite tech firms to healthcare innovators, these businesses are well positioned to protect their market dominance for years to come.

iShares S&P 500 ETF (ASX: IVV)

Every king wants an empire, and there are few bigger than the United States equity market. The iShares S&P 500 ETF offers exposure to 500 of the most powerful and influential companies in the world. This includes Apple, Microsoft, Nvidia, and Amazon. For investors looking to hold court with the corporate elite, this fund is a globally recognised standard.

Betashares Global Quality Leaders ETF (ASX: QLTY)

The Betashares Global Quality Leaders ETF scours the globe for top-tier companies with strong profitability, low leverage, and consistently high returns on equity. The result is a portfolio of blue-chip businesses from a variety of sectors and regions. It is another ASX ETF that was recently named as one to buy by analysts at Betashares.

Betashares Global Robotics and Artificial Intelligence ETF (ASX: RBTZ)

The Betashares Global Robotics and Artificial Intelligence ETF gives investors exposure to the future by tracking companies at the forefront of robotics, automation, and AI. These aren't just the kings of tomorrow — they're revolutionising industries today. This includes stocks such as Intuitive Surgical, Nvidia, and Keyence. The fund manager also recently named the Betashares Global Robotics and Artificial Intelligence ETF as one to consider buying.